/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/Problem17_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:23:19,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:23:19,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:23:19,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:23:19,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:23:19,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:23:19,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:23:19,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:23:19,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:23:19,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:23:19,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:23:19,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:23:19,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:23:19,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:23:19,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:23:19,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:23:19,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:23:19,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:23:19,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:23:19,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:23:19,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:23:19,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:23:19,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:23:19,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:23:19,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:23:19,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:23:19,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:23:19,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:23:19,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:23:19,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:23:19,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:23:19,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:23:19,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:23:19,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:23:19,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:23:19,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:23:19,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:23:19,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:23:19,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:23:19,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:23:19,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:23:19,511 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 22:23:19,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:23:19,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:23:19,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:23:19,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:23:19,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:23:19,539 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:23:19,539 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:23:19,539 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:23:19,539 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:23:19,539 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:23:19,540 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:23:19,540 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:23:19,540 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:23:19,540 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:23:19,540 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:23:19,540 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:23:19,540 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:23:19,540 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:23:19,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:23:19,541 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:23:19,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:23:19,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:23:19,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:23:19,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:23:19,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:23:19,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:23:19,542 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:23:19,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:23:19,542 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:23:19,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:23:19,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:23:19,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:23:19,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:23:19,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:23:19,543 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:23:19,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:23:19,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:23:19,543 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:23:19,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:23:19,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:23:19,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:23:19,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:23:19,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:23:19,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:23:19,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:23:19,755 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:23:19,757 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:23:19,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label45.c [2023-03-31 22:23:20,863 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:23:21,119 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:23:21,119 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label45.c [2023-03-31 22:23:21,143 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0189cafe0/cd3ec0504cd44e32a87d174b548c5712/FLAG472edeca2 [2023-03-31 22:23:21,157 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0189cafe0/cd3ec0504cd44e32a87d174b548c5712 [2023-03-31 22:23:21,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:23:21,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:23:21,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:23:21,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:23:21,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:23:21,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:23:21" (1/1) ... [2023-03-31 22:23:21,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65ef182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:21, skipping insertion in model container [2023-03-31 22:23:21,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:23:21" (1/1) ... [2023-03-31 22:23:21,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:23:21,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:23:21,465 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/Problem17_label45.c[7434,7447] [2023-03-31 22:23:21,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:23:21,822 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:23:21,846 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/Problem17_label45.c[7434,7447] [2023-03-31 22:23:22,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:23:22,051 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:23:22,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22 WrapperNode [2023-03-31 22:23:22,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:23:22,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:23:22,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:23:22,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:23:22,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (1/1) ... [2023-03-31 22:23:22,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (1/1) ... [2023-03-31 22:23:22,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (1/1) ... [2023-03-31 22:23:22,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (1/1) ... [2023-03-31 22:23:22,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (1/1) ... [2023-03-31 22:23:22,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (1/1) ... [2023-03-31 22:23:22,194 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (1/1) ... [2023-03-31 22:23:22,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (1/1) ... [2023-03-31 22:23:22,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:23:22,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:23:22,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:23:22,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:23:22,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (1/1) ... [2023-03-31 22:23:22,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:23:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:23:22,266 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 22:23:22,273 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 22:23:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:23:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:23:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:23:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:23:22,296 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:23:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:23:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:23:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:23:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:23:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:23:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:23:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:23:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:23:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:23:22,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:23:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:23:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:23:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:23:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:23:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:23:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:23:22,390 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:23:22,392 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:23:24,804 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:23:33,451 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:23:33,451 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:23:33,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:23:33 BoogieIcfgContainer [2023-03-31 22:23:33,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:23:33,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:23:33,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:23:33,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:23:33,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:23:21" (1/3) ... [2023-03-31 22:23:33,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a6cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:23:33, skipping insertion in model container [2023-03-31 22:23:33,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:23:22" (2/3) ... [2023-03-31 22:23:33,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a6cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:23:33, skipping insertion in model container [2023-03-31 22:23:33,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:23:33" (3/3) ... [2023-03-31 22:23:33,460 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label45.c [2023-03-31 22:23:33,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:23:33,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:23:33,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:23:33,536 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;@59885ac1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:23:33,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:23:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:23:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:23:33,544 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:23:33,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:23:33,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:23:33,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:23:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2084307479, now seen corresponding path program 1 times [2023-03-31 22:23:33,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:23:33,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092953949] [2023-03-31 22:23:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:23:33,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:23:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:23:33,894 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 22:23:33,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:23:33,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092953949] [2023-03-31 22:23:33,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092953949] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:23:33,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:23:33,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:23:33,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859436575] [2023-03-31 22:23:33,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:23:33,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:23:33,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:23:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:23:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:23:33,930 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:23:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:23:35,508 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:23:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:23:35,515 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 22:23:35,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:23:35,526 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:23:35,526 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:23:35,533 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 22:23:35,535 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 242 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:23:35,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 195 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-31 22:23:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:23:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:23:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5751633986928104) internal successors, (723), 459 states have internal predecessors, (723), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:23:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 734 transitions. [2023-03-31 22:23:35,581 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 734 transitions. Word has length 11 [2023-03-31 22:23:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:23:35,581 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 734 transitions. [2023-03-31 22:23:35,581 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 22:23:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 734 transitions. [2023-03-31 22:23:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:23:35,583 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:23:35,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:23:35,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:23:35,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:23:35,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:23:35,584 INFO L85 PathProgramCache]: Analyzing trace with hash -62047010, now seen corresponding path program 1 times [2023-03-31 22:23:35,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:23:35,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830674287] [2023-03-31 22:23:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:23:35,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:23:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:23:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:23:35,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:23:35,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830674287] [2023-03-31 22:23:35,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830674287] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:23:35,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573008173] [2023-03-31 22:23:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:23:35,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:23:35,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:23:35,808 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 22:23:35,823 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 22:23:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:23:35,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 22:23:35,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:23:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:23:36,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:23:37,439 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 22:23:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573008173] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:23:37,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:23:37,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-03-31 22:23:37,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104499246] [2023-03-31 22:23:37,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:23:37,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 22:23:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:23:37,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 22:23:37,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:23:37,442 INFO L87 Difference]: Start difference. First operand 469 states and 734 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:23:41,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 22:23:43,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 22:23:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:23:43,885 INFO L93 Difference]: Finished difference Result 1859 states and 2947 transitions. [2023-03-31 22:23:43,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:23:43,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-03-31 22:23:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:23:43,891 INFO L225 Difference]: With dead ends: 1859 [2023-03-31 22:23:43,891 INFO L226 Difference]: Without dead ends: 1395 [2023-03-31 22:23:43,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:23:43,893 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 954 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 970 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:23:43,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 41 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 1343 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2023-03-31 22:23:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2023-03-31 22:23:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1358. [2023-03-31 22:23:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1338 states have (on average 1.5328849028400597) internal successors, (2051), 1340 states have internal predecessors, (2051), 9 states have call successors, (9), 9 states have call predecessors, (9), 10 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) [2023-03-31 22:23:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 2096 transitions. [2023-03-31 22:23:43,951 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 2096 transitions. Word has length 26 [2023-03-31 22:23:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:23:43,952 INFO L495 AbstractCegarLoop]: Abstraction has 1358 states and 2096 transitions. [2023-03-31 22:23:43,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:23:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 2096 transitions. [2023-03-31 22:23:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 22:23:43,954 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:23:43,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:23:43,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:23:44,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:23:44,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:23:44,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:23:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2008208469, now seen corresponding path program 1 times [2023-03-31 22:23:44,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:23:44,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128959376] [2023-03-31 22:23:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:23:44,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:23:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:23:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 22:23:44,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:23:44,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128959376] [2023-03-31 22:23:44,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128959376] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:23:44,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631337954] [2023-03-31 22:23:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:23:44,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:23:44,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:23:44,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:23:44,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:23:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:23:44,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:23:44,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:23:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:23:44,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:23:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:23:44,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631337954] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:23:44,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483075904] [2023-03-31 22:23:44,519 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 22:23:44,519 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:23:44,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:23:44,524 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:23:44,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:23:44,601 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 50 for LOIs [2023-03-31 22:23:44,702 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2023-03-31 22:23:45,451 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 17802 conjuctions. This might take some time... [2023-03-31 22:23:45,793 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 262 conjuctions. [2023-03-31 22:23:45,838 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-03-31 22:23:45,874 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8276 conjuctions. This might take some time... [2023-03-31 22:23:46,039 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 330 conjuctions. [2023-03-31 22:23:46,734 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 45 for LOIs [2023-03-31 22:23:46,850 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2023-03-31 22:23:47,867 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10440 conjuctions. This might take some time... [2023-03-31 22:23:48,102 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 260 conjuctions. [2023-03-31 22:24:07,309 WARN L223 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 465 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)