/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:29:48,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:29:48,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:29:48,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:29:48,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:29:48,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:29:48,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:29:48,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:29:48,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:29:48,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:29:48,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:29:48,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:29:48,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:29:48,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:29:48,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:29:48,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:29:48,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:29:48,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:29:48,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:29:48,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:29:48,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:29:48,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:29:48,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:29:48,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:29:48,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:29:48,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:29:48,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:29:48,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:29:48,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:29:48,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:29:48,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:29:48,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:29:48,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:29:48,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:29:48,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:29:48,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:29:48,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:29:48,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:29:48,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:29:48,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:29:48,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:29:48,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:29:48,593 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:29:48,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:29:48,594 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:29:48,594 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:29:48,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:29:48,595 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:29:48,595 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:29:48,595 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:29:48,595 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:29:48,595 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:29:48,595 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:29:48,596 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:29:48,596 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:29:48,596 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:29:48,596 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:29:48,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:29:48,596 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:29:48,596 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:29:48,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:29:48,597 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:29:48,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:29:48,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:29:48,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:29:48,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:29:48,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:29:48,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:29:48,597 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:29:48,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:29:48,598 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:29:48,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:29:48,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:29:48,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:29:48,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:29:48,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:29:48,598 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:29:48,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:29:48,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:29:48,599 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:29:48,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:29:48,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:29:48,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:29:48,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:29:48,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:29:48,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:29:48,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:29:48,821 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:29:48,822 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:29:48,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label09.c [2023-03-31 22:29:49,945 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:29:50,359 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:29:50,359 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label09.c [2023-03-31 22:29:50,394 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c243f065d/4c2c0a2407ce42629e084dd329f56b63/FLAGee5e7e6cd [2023-03-31 22:29:50,415 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c243f065d/4c2c0a2407ce42629e084dd329f56b63 [2023-03-31 22:29:50,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:29:50,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:29:50,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:29:50,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:29:50,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:29:50,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:29:50" (1/1) ... [2023-03-31 22:29:50,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46beb7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:50, skipping insertion in model container [2023-03-31 22:29:50,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:29:50" (1/1) ... [2023-03-31 22:29:50,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:29:50,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:29:50,853 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/Problem19_label09.c[6533,6546] [2023-03-31 22:29:51,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:29:51,738 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:29:51,764 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/Problem19_label09.c[6533,6546] [2023-03-31 22:29:52,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:29:52,320 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:29:52,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52 WrapperNode [2023-03-31 22:29:52,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:29:52,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:29:52,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:29:52,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:29:52,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (1/1) ... [2023-03-31 22:29:52,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (1/1) ... [2023-03-31 22:29:52,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (1/1) ... [2023-03-31 22:29:52,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (1/1) ... [2023-03-31 22:29:52,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (1/1) ... [2023-03-31 22:29:52,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (1/1) ... [2023-03-31 22:29:52,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (1/1) ... [2023-03-31 22:29:52,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (1/1) ... [2023-03-31 22:29:52,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:29:52,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:29:52,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:29:52,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:29:52,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (1/1) ... [2023-03-31 22:29:52,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:29:52,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:29:52,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:29:52,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:29:52,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:29:52,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:29:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:29:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:29:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:29:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:29:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:29:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:29:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:29:52,822 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:29:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:29:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:29:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:29:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:29:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:29:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:29:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:29:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:29:52,909 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:29:52,911 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:29:58,739 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:30:11,891 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:30:11,891 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:30:11,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:30:11 BoogieIcfgContainer [2023-03-31 22:30:11,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:30:11,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:30:11,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:30:11,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:30:11,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:29:50" (1/3) ... [2023-03-31 22:30:11,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a51f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:30:11, skipping insertion in model container [2023-03-31 22:30:11,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:29:52" (2/3) ... [2023-03-31 22:30:11,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a51f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:30:11, skipping insertion in model container [2023-03-31 22:30:11,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:30:11" (3/3) ... [2023-03-31 22:30:11,902 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label09.c [2023-03-31 22:30:11,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:30:11,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:30:11,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:30:11,987 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;@79091205, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:30:11,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:30:11,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:30:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:30:11,998 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:11,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:30:11,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:12,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1235902947, now seen corresponding path program 1 times [2023-03-31 22:30:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:12,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638375779] [2023-03-31 22:30:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:30:12,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638375779] [2023-03-31 22:30:12,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638375779] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:12,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:12,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:30:12,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544515578] [2023-03-31 22:30:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:12,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:30:12,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:30:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:30:12,314 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:30:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:30:17,705 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:30:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:30:17,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:30:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:30:17,733 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:30:17,733 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:30:17,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:30:17,746 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1159 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3881 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 4818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 3881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:30:17,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1159 Valid, 156 Invalid, 4818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 3881 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-03-31 22:30:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:30:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2229. [2023-03-31 22:30:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2203 states have (on average 1.9450748978665455) internal successors, (4285), 2203 states have internal predecessors, (4285), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-03-31 22:30:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 4320 transitions. [2023-03-31 22:30:17,867 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 4320 transitions. Word has length 11 [2023-03-31 22:30:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:30:17,868 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 4320 transitions. [2023-03-31 22:30:17,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:30:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 4320 transitions. [2023-03-31 22:30:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 22:30:17,870 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:17,870 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] [2023-03-31 22:30:17,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:30:17,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:17,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:17,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1174825888, now seen corresponding path program 1 times [2023-03-31 22:30:17,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:17,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666114271] [2023-03-31 22:30:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:17,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:30:18,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:18,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666114271] [2023-03-31 22:30:18,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666114271] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:18,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:18,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:30:18,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423256107] [2023-03-31 22:30:18,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:30:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:30:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:30:18,030 INFO L87 Difference]: Start difference. First operand 2229 states and 4320 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) [2023-03-31 22:30:24,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:30:24,983 INFO L93 Difference]: Finished difference Result 6761 states and 13161 transitions. [2023-03-31 22:30:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:30:24,984 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 [2023-03-31 22:30:24,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:30:25,006 INFO L225 Difference]: With dead ends: 6761 [2023-03-31 22:30:25,006 INFO L226 Difference]: Without dead ends: 4537 [2023-03-31 22:30:25,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:30:25,011 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 3858 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6431 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3858 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 6431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:30:25,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3858 Valid, 143 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 6431 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-03-31 22:30:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2023-03-31 22:30:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 4490. [2023-03-31 22:30:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4490 states, 4427 states have (on average 1.8599503049469166) internal successors, (8234), 4431 states have internal predecessors, (8234), 23 states have call successors, (23), 23 states have call predecessors, (23), 39 states have return successors, (116), 35 states have call predecessors, (116), 22 states have call successors, (116) [2023-03-31 22:30:25,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4490 states to 4490 states and 8373 transitions. [2023-03-31 22:30:25,140 INFO L78 Accepts]: Start accepts. Automaton has 4490 states and 8373 transitions. Word has length 25 [2023-03-31 22:30:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:30:25,141 INFO L495 AbstractCegarLoop]: Abstraction has 4490 states and 8373 transitions. [2023-03-31 22:30:25,141 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) [2023-03-31 22:30:25,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4490 states and 8373 transitions. [2023-03-31 22:30:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 22:30:25,142 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:25,142 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] [2023-03-31 22:30:25,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:30:25,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:25,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1691906840, now seen corresponding path program 1 times [2023-03-31 22:30:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:25,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635343273] [2023-03-31 22:30:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:25,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:30:25,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:25,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635343273] [2023-03-31 22:30:25,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635343273] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:25,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:25,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:30:25,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838403530] [2023-03-31 22:30:25,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:25,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:30:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:25,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:30:25,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:30:25,280 INFO L87 Difference]: Start difference. First operand 4490 states and 8373 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:30:32,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 22:30:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:30:33,055 INFO L93 Difference]: Finished difference Result 12484 states and 23499 transitions. [2023-03-31 22:30:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:30:33,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-03-31 22:30:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:30:33,086 INFO L225 Difference]: With dead ends: 12484 [2023-03-31 22:30:33,086 INFO L226 Difference]: Without dead ends: 7999 [2023-03-31 22:30:33,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:30:33,096 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 3880 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6366 mSolverCounterSat, 2155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3880 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 8521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2155 IncrementalHoareTripleChecker+Valid, 6366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:30:33,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3880 Valid, 147 Invalid, 8521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2155 Valid, 6366 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-03-31 22:30:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7999 states. [2023-03-31 22:30:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7999 to 7941. [2023-03-31 22:30:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7941 states, 7809 states have (on average 1.7496478422333206) internal successors, (13663), 7821 states have internal predecessors, (13663), 38 states have call successors, (38), 38 states have call predecessors, (38), 93 states have return successors, (414), 81 states have call predecessors, (414), 37 states have call successors, (414) [2023-03-31 22:30:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7941 states to 7941 states and 14115 transitions. [2023-03-31 22:30:33,274 INFO L78 Accepts]: Start accepts. Automaton has 7941 states and 14115 transitions. Word has length 28 [2023-03-31 22:30:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:30:33,274 INFO L495 AbstractCegarLoop]: Abstraction has 7941 states and 14115 transitions. [2023-03-31 22:30:33,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:30:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7941 states and 14115 transitions. [2023-03-31 22:30:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 22:30:33,275 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:33,275 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] [2023-03-31 22:30:33,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:30:33,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:33,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1113308248, now seen corresponding path program 1 times [2023-03-31 22:30:33,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:33,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971279582] [2023-03-31 22:30:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:30:33,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:33,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971279582] [2023-03-31 22:30:33,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971279582] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:33,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:30:33,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:30:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156323771] [2023-03-31 22:30:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:33,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:30:33,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:33,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:30:33,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:30:33,386 INFO L87 Difference]: Start difference. First operand 7941 states and 14115 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:30:40,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:30:40,823 INFO L93 Difference]: Finished difference Result 23274 states and 42279 transitions. [2023-03-31 22:30:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:30:40,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-03-31 22:30:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:30:40,880 INFO L225 Difference]: With dead ends: 23274 [2023-03-31 22:30:40,880 INFO L226 Difference]: Without dead ends: 15338 [2023-03-31 22:30:40,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:30:40,906 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3797 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 6873 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3797 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 8612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1739 IncrementalHoareTripleChecker+Valid, 6873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:30:40,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3797 Valid, 180 Invalid, 8612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 6873 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-03-31 22:30:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15338 states. [2023-03-31 22:30:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15338 to 15003. [2023-03-31 22:30:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15003 states, 14651 states have (on average 1.5081564398334584) internal successors, (22096), 14701 states have internal predecessors, (22096), 68 states have call successors, (68), 68 states have call predecessors, (68), 283 states have return successors, (1704), 233 states have call predecessors, (1704), 67 states have call successors, (1704) [2023-03-31 22:30:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15003 states to 15003 states and 23868 transitions. [2023-03-31 22:30:41,359 INFO L78 Accepts]: Start accepts. Automaton has 15003 states and 23868 transitions. Word has length 29 [2023-03-31 22:30:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:30:41,359 INFO L495 AbstractCegarLoop]: Abstraction has 15003 states and 23868 transitions. [2023-03-31 22:30:41,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:30:41,360 INFO L276 IsEmpty]: Start isEmpty. Operand 15003 states and 23868 transitions. [2023-03-31 22:30:41,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 22:30:41,362 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:30:41,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 22:30:41,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:30:41,362 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:30:41,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:30:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2093340410, now seen corresponding path program 1 times [2023-03-31 22:30:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:30:41,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78183493] [2023-03-31 22:30:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:41,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:30:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:30:41,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:30:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78183493] [2023-03-31 22:30:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78183493] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:30:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845393002] [2023-03-31 22:30:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:30:41,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:30:41,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:30:41,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:30:41,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:30:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:30:41,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:30:41,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:30:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:30:41,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:30:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845393002] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:30:41,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:30:41,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-03-31 22:30:41,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610436481] [2023-03-31 22:30:41,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:30:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:30:41,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:30:41,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:30:41,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:30:41,731 INFO L87 Difference]: Start difference. First operand 15003 states and 23868 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)