/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:29:24,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:29:24,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:29:24,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:29:24,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:29:24,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:29:24,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:29:24,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:29:24,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:29:24,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:29:24,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:29:24,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:29:24,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:29:24,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:29:24,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:29:24,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:29:24,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:29:24,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:29:24,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:29:24,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:29:24,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:29:24,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:29:24,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:29:24,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:29:24,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:29:24,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:29:24,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:29:24,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:29:24,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:29:24,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:29:24,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:29:24,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:29:24,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:29:24,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:29:24,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:29:24,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:29:24,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:29:24,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:29:24,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:29:24,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:29:24,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:29:24,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:29:24,523 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:29:24,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:29:24,523 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:29:24,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:29:24,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:29:24,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:29:24,524 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:29:24,524 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:29:24,524 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:29:24,530 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:29:24,531 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:29:24,531 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:29:24,531 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:29:24,531 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:29:24,531 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:29:24,531 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:29:24,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:29:24,531 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:29:24,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:29:24,532 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:29:24,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:29:24,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:29:24,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:29:24,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:29:24,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:29:24,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:29:24,533 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:29:24,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:29:24,533 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:29:24,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:29:24,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:29:24,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:29:24,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:29:24,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:29:24,534 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:29:24,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:29:24,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:29:24,534 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:29:24,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:29:24,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:29:24,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:29:24,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:29:24,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:29:24,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:29:24,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:29:24,756 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:29:24,757 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:29:24,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label10.c [2023-04-01 10:29:25,814 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:29:26,187 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:29:26,188 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label10.c [2023-04-01 10:29:26,215 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2d6ffe2/4b7df901dc914efa89fb454f2c7db251/FLAG24dc3349b [2023-04-01 10:29:26,233 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2d6ffe2/4b7df901dc914efa89fb454f2c7db251 [2023-04-01 10:29:26,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:29:26,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:29:26,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:29:26,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:29:26,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:29:26,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:29:26" (1/1) ... [2023-04-01 10:29:26,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a93e8ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:26, skipping insertion in model container [2023-04-01 10:29:26,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:29:26" (1/1) ... [2023-04-01 10:29:26,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:29:26,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:29:26,581 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label10.c[2213,2226] [2023-04-01 10:29:27,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:29:27,265 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:29:27,287 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label10.c[2213,2226] [2023-04-01 10:29:27,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:29:27,552 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:29:27,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27 WrapperNode [2023-04-01 10:29:27,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:29:27,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:29:27,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:29:27,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:29:27,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (1/1) ... [2023-04-01 10:29:27,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (1/1) ... [2023-04-01 10:29:27,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (1/1) ... [2023-04-01 10:29:27,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (1/1) ... [2023-04-01 10:29:27,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (1/1) ... [2023-04-01 10:29:27,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (1/1) ... [2023-04-01 10:29:27,696 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (1/1) ... [2023-04-01 10:29:27,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (1/1) ... [2023-04-01 10:29:27,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:29:27,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:29:27,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:29:27,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:29:27,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (1/1) ... [2023-04-01 10:29:27,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:29:27,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:29:27,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:29:27,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:29:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:29:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:29:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:29:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:29:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:29:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:29:27,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:29:27,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:29:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:29:27,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:29:27,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:29:27,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:29:27,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:29:27,862 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:29:27,864 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:29:30,616 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:29:37,507 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:29:37,507 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:29:37,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:37 BoogieIcfgContainer [2023-04-01 10:29:37,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:29:37,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:29:37,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:29:37,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:29:37,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:29:26" (1/3) ... [2023-04-01 10:29:37,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b60f714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:37, skipping insertion in model container [2023-04-01 10:29:37,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:27" (2/3) ... [2023-04-01 10:29:37,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b60f714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:37, skipping insertion in model container [2023-04-01 10:29:37,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:37" (3/3) ... [2023-04-01 10:29:37,521 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label10.c [2023-04-01 10:29:37,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:29:37,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:29:37,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:29:37,612 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;@58fa710f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:29:37,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:29:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 10:29:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:29:37,625 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:29:37,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:29:37,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:29:37,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:29:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash 510739684, now seen corresponding path program 1 times [2023-04-01 10:29:37,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:29:37,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905105247] [2023-04-01 10:29:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:37,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:29:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:37,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:29:37,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905105247] [2023-04-01 10:29:37,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905105247] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:29:37,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:29:37,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:29:37,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954663622] [2023-04-01 10:29:37,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:29:37,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:29:37,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:29:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:29:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:29:38,020 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:29:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:29:40,387 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 10:29:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:29:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:29:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:29:40,418 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 10:29:40,418 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 10:29:40,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:29:40,429 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:29:40,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 10:29:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 10:29:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 10:29:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 10:29:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions. [2023-04-01 10:29:40,505 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11 [2023-04-01 10:29:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:29:40,506 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions. [2023-04-01 10:29:40,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:29:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions. [2023-04-01 10:29:40,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:29:40,507 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:29:40,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:29:40,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:29:40,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:29:40,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:29:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1363833710, now seen corresponding path program 1 times [2023-04-01 10:29:40,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:29:40,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715266242] [2023-04-01 10:29:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:40,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:29:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:40,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:29:40,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715266242] [2023-04-01 10:29:40,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715266242] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:29:40,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:29:40,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:29:40,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53699204] [2023-04-01 10:29:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:29:40,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:29:40,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:29:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:29:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:29:40,694 INFO L87 Difference]: Start difference. First operand 919 states and 1512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:29:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:29:43,395 INFO L93 Difference]: Finished difference Result 2781 states and 4622 transitions. [2023-04-01 10:29:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:29:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 10:29:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:29:43,407 INFO L225 Difference]: With dead ends: 2781 [2023-04-01 10:29:43,407 INFO L226 Difference]: Without dead ends: 1867 [2023-04-01 10:29:43,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:29:43,410 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:29:43,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 10:29:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-04-01 10:29:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822. [2023-04-01 10:29:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 10:29:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions. [2023-04-01 10:29:43,475 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21 [2023-04-01 10:29:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:29:43,475 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions. [2023-04-01 10:29:43,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:29:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions. [2023-04-01 10:29:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:29:43,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:29:43,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:29:43,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:29:43,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:29:43,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:29:43,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1686859338, now seen corresponding path program 1 times [2023-04-01 10:29:43,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:29:43,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529475027] [2023-04-01 10:29:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:43,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:29:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:43,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:29:43,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529475027] [2023-04-01 10:29:43,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529475027] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:29:43,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:29:43,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:29:43,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128399841] [2023-04-01 10:29:43,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:29:43,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:29:43,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:29:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:29:43,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:29:43,610 INFO L87 Difference]: Start difference. First operand 1822 states and 2823 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:29:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:29:46,110 INFO L93 Difference]: Finished difference Result 5051 states and 8054 transitions. [2023-04-01 10:29:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:29:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 10:29:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:29:46,127 INFO L225 Difference]: With dead ends: 5051 [2023-04-01 10:29:46,127 INFO L226 Difference]: Without dead ends: 3234 [2023-04-01 10:29:46,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:29:46,137 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:29:46,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 10:29:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-04-01 10:29:46,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207. [2023-04-01 10:29:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-01 10:29:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions. [2023-04-01 10:29:46,234 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25 [2023-04-01 10:29:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:29:46,234 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions. [2023-04-01 10:29:46,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:29:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions. [2023-04-01 10:29:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 10:29:46,237 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:29:46,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:29:46,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:29:46,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:29:46,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:29:46,238 INFO L85 PathProgramCache]: Analyzing trace with hash -42858099, now seen corresponding path program 1 times [2023-04-01 10:29:46,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:29:46,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852931902] [2023-04-01 10:29:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:29:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:46,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:29:46,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852931902] [2023-04-01 10:29:46,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852931902] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:29:46,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:29:46,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:29:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670312086] [2023-04-01 10:29:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:29:46,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:29:46,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:29:46,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:29:46,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:29:46,409 INFO L87 Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:29:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:29:48,074 INFO L93 Difference]: Finished difference Result 9134 states and 12952 transitions. [2023-04-01 10:29:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:29:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-04-01 10:29:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:29:48,111 INFO L225 Difference]: With dead ends: 9134 [2023-04-01 10:29:48,112 INFO L226 Difference]: Without dead ends: 5932 [2023-04-01 10:29:48,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:29:48,129 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 450 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:29:48,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 838 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 10:29:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2023-04-01 10:29:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5792. [2023-04-01 10:29:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5701 states have (on average 1.278196807577618) internal successors, (7287), 5722 states have internal predecessors, (7287), 29 states have call successors, (29), 29 states have call predecessors, (29), 61 states have return successors, (355), 40 states have call predecessors, (355), 28 states have call successors, (355) [2023-04-01 10:29:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 7671 transitions. [2023-04-01 10:29:48,295 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 7671 transitions. Word has length 58 [2023-04-01 10:29:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:29:48,296 INFO L495 AbstractCegarLoop]: Abstraction has 5792 states and 7671 transitions. [2023-04-01 10:29:48,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:29:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 7671 transitions. [2023-04-01 10:29:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 10:29:48,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:29:48,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:29:48,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:29:48,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:29:48,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:29:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1724195028, now seen corresponding path program 1 times [2023-04-01 10:29:48,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:29:48,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422613599] [2023-04-01 10:29:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:48,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:29:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:48,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:29:48,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422613599] [2023-04-01 10:29:48,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422613599] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:29:48,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432090540] [2023-04-01 10:29:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:48,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:29:48,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:29:48,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:29:48,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:29:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:48,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:29:48,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:29:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:48,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:29:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432090540] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:29:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330648272] [2023-04-01 10:29:48,968 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-04-01 10:29:48,968 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:29:48,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:29:48,980 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:29:48,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:29:49,320 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 10:29:49,519 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 10:29:52,915 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49