/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:13:59,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:13:59,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:13:59,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:13:59,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:13:59,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:13:59,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:13:59,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:13:59,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:13:59,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:13:59,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:13:59,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:13:59,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:13:59,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:13:59,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:13:59,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:13:59,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:13:59,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:13:59,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:13:59,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:13:59,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:13:59,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:13:59,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:13:59,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:13:59,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:13:59,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:13:59,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:13:59,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:13:59,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:13:59,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:13:59,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:13:59,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:13:59,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:13:59,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:13:59,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:13:59,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:13:59,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:13:59,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:13:59,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:13:59,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:13:59,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:13:59,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:13:59,143 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:13:59,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:13:59,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:13:59,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:13:59,144 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:13:59,145 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:13:59,145 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:13:59,145 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:13:59,145 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:13:59,145 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:13:59,145 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:13:59,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:13:59,145 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:13:59,145 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:13:59,145 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:13:59,145 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:13:59,146 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:13:59,146 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:13:59,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:13:59,146 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:13:59,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:13:59,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:13:59,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:13:59,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:13:59,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:13:59,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:13:59,147 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:13:59,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:13:59,147 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:13:59,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:13:59,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:13:59,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:13:59,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:13:59,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:13:59,147 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:13:59,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:13:59,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:13:59,148 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:13:59,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:13:59,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:13:59,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:13:59,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:13:59,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:13:59,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:13:59,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:13:59,390 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:13:59,391 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:13:59,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label23.c [2023-04-01 04:14:00,342 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:14:00,896 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:14:00,897 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label23.c [2023-04-01 04:14:00,910 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43721913f/4ee42f1ee2f848bf86ab211a668e167f/FLAGf0d097b1d [2023-04-01 04:14:00,939 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43721913f/4ee42f1ee2f848bf86ab211a668e167f [2023-04-01 04:14:00,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:14:00,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:14:00,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:14:00,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:14:00,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:14:00,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:14:00" (1/1) ... [2023-04-01 04:14:00,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc73882 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:00, skipping insertion in model container [2023-04-01 04:14:00,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:14:00" (1/1) ... [2023-04-01 04:14:00,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:14:01,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:14:01,292 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/Problem15_label23.c[2237,2250] [2023-04-01 04:14:01,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:14:01,699 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:14:01,732 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/Problem15_label23.c[2237,2250] [2023-04-01 04:14:02,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:14:02,025 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:14:02,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02 WrapperNode [2023-04-01 04:14:02,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:14:02,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:14:02,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:14:02,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:14:02,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (1/1) ... [2023-04-01 04:14:02,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (1/1) ... [2023-04-01 04:14:02,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (1/1) ... [2023-04-01 04:14:02,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (1/1) ... [2023-04-01 04:14:02,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (1/1) ... [2023-04-01 04:14:02,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (1/1) ... [2023-04-01 04:14:02,209 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (1/1) ... [2023-04-01 04:14:02,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (1/1) ... [2023-04-01 04:14:02,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:14:02,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:14:02,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:14:02,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:14:02,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (1/1) ... [2023-04-01 04:14:02,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:14:02,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:02,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:14:02,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:14:02,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:14:02,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:14:02,320 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:14:02,320 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:14:02,320 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:14:02,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:14:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:14:02,369 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:14:02,370 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:14:04,565 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:14:05,083 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:14:05,085 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:14:05,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:14:05 BoogieIcfgContainer [2023-04-01 04:14:05,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:14:05,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:14:05,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:14:05,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:14:05,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:14:00" (1/3) ... [2023-04-01 04:14:05,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c6170e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:14:05, skipping insertion in model container [2023-04-01 04:14:05,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:14:02" (2/3) ... [2023-04-01 04:14:05,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c6170e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:14:05, skipping insertion in model container [2023-04-01 04:14:05,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:14:05" (3/3) ... [2023-04-01 04:14:05,093 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label23.c [2023-04-01 04:14:05,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:14:05,106 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:14:05,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:14:05,157 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;@23282478, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:14:05,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:14:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:14:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:14:05,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:05,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:05,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:05,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash 468026020, now seen corresponding path program 1 times [2023-04-01 04:14:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:05,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456862226] [2023-04-01 04:14:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:05,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456862226] [2023-04-01 04:14:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456862226] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:05,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:05,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:14:05,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609085975] [2023-04-01 04:14:05,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:05,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:14:05,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:05,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:14:05,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:05,497 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:14:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:06,948 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:14:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:14:06,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:14:06,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:06,970 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:14:06,971 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:14:06,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:06,982 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:06,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 48 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:14:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:14:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 442. [2023-04-01 04:14:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 432 states have (on average 1.9305555555555556) internal successors, (834), 432 states have internal predecessors, (834), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:14:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 845 transitions. [2023-04-01 04:14:07,063 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 845 transitions. Word has length 11 [2023-04-01 04:14:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:07,064 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 845 transitions. [2023-04-01 04:14:07,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:14:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 845 transitions. [2023-04-01 04:14:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:14:07,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:07,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:07,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:14:07,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:07,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1975944626, now seen corresponding path program 1 times [2023-04-01 04:14:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:07,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005704186] [2023-04-01 04:14:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:07,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:07,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:07,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005704186] [2023-04-01 04:14:07,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005704186] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:07,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:07,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:14:07,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732942324] [2023-04-01 04:14:07,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:07,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:14:07,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:07,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:14:07,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:07,162 INFO L87 Difference]: Start difference. First operand 442 states and 845 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:14:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:08,144 INFO L93 Difference]: Finished difference Result 1314 states and 2536 transitions. [2023-04-01 04:14:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:14:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 04:14:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:08,151 INFO L225 Difference]: With dead ends: 1314 [2023-04-01 04:14:08,152 INFO L226 Difference]: Without dead ends: 877 [2023-04-01 04:14:08,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:14:08,159 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:08,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 04:14:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2023-04-01 04:14:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 842. [2023-04-01 04:14:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 826 states have (on average 1.6004842615012107) internal successors, (1322), 826 states have internal predecessors, (1322), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 04:14:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1349 transitions. [2023-04-01 04:14:08,208 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1349 transitions. Word has length 21 [2023-04-01 04:14:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:08,208 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1349 transitions. [2023-04-01 04:14:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:14:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1349 transitions. [2023-04-01 04:14:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 04:14:08,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:08,209 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] [2023-04-01 04:14:08,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:14:08,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:08,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash 147059302, now seen corresponding path program 1 times [2023-04-01 04:14:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:08,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192449411] [2023-04-01 04:14:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:08,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192449411] [2023-04-01 04:14:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192449411] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:14:08,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:14:08,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:14:08,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474223684] [2023-04-01 04:14:08,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:14:08,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:14:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:14:08,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:14:08,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:14:08,392 INFO L87 Difference]: Start difference. First operand 842 states and 1349 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:14:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:14:10,143 INFO L93 Difference]: Finished difference Result 2560 states and 4171 transitions. [2023-04-01 04:14:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:14:10,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 38 [2023-04-01 04:14:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:14:10,153 INFO L225 Difference]: With dead ends: 2560 [2023-04-01 04:14:10,153 INFO L226 Difference]: Without dead ends: 1723 [2023-04-01 04:14:10,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:14:10,160 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 814 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:14:10,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 04:14:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2023-04-01 04:14:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1380. [2023-04-01 04:14:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1344 states have (on average 1.4308035714285714) internal successors, (1923), 1354 states have internal predecessors, (1923), 13 states have call successors, (13), 13 states have call predecessors, (13), 22 states have return successors, (65), 12 states have call predecessors, (65), 12 states have call successors, (65) [2023-04-01 04:14:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2001 transitions. [2023-04-01 04:14:10,214 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2001 transitions. Word has length 38 [2023-04-01 04:14:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:14:10,214 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2001 transitions. [2023-04-01 04:14:10,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:14:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2001 transitions. [2023-04-01 04:14:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-04-01 04:14:10,221 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:14:10,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:14:10,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:14:10,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:14:10,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:14:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1485567112, now seen corresponding path program 1 times [2023-04-01 04:14:10,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:14:10,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973939010] [2023-04-01 04:14:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:14:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:10,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:14:10,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973939010] [2023-04-01 04:14:10,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973939010] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:14:10,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692717287] [2023-04-01 04:14:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:14:10,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:14:10,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:14:10,473 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:14:10,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:14:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:14:10,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:14:10,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:14:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:10,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:14:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:14:10,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692717287] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:14:10,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1128514101] [2023-04-01 04:14:10,956 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 04:14:10,956 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:14:10,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:14:10,964 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:14:10,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:14:11,134 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:14:11,363 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2023-04-01 04:14:16,617 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 50