/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:09:56,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:09:56,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:09:56,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:09:56,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:09:56,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:09:56,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:09:56,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:09:56,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:09:56,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:09:56,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:09:56,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:09:56,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:09:56,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:09:56,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:09:56,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:09:56,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:09:56,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:09:56,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:09:56,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:09:56,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:09:56,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:09:56,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:09:56,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:09:56,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:09:56,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:09:56,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:09:56,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:09:56,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:09:56,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:09:56,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:09:56,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:09:56,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:09:56,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:09:56,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:09:56,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:09:56,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:09:56,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:09:56,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:09:56,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:09:56,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:09:56,322 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:09:56,336 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:09:56,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:09:56,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:09:56,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:09:56,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:09:56,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:09:56,337 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:09:56,337 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:09:56,337 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:09:56,338 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:09:56,338 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:09:56,338 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:09:56,338 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:09:56,338 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:09:56,338 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:09:56,338 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:09:56,338 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:09:56,338 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:09:56,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:09:56,339 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:09:56,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:09:56,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:09:56,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:09:56,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:09:56,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:09:56,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:09:56,340 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:09:56,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:09:56,340 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:09:56,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:09:56,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:09:56,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:09:56,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:09:56,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:09:56,341 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:09:56,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:09:56,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:09:56,341 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:09:56,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:09:56,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:09:56,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:09:56,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:09:56,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:09:56,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:09:56,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:09:56,544 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:09:56,544 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:09:56,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label49.c [2023-04-01 10:09:57,745 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:09:58,105 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:09:58,106 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label49.c [2023-04-01 10:09:58,133 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea89feacc/61556d1c10564b4abbcc47d61da4400f/FLAG589d64360 [2023-04-01 10:09:58,150 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea89feacc/61556d1c10564b4abbcc47d61da4400f [2023-04-01 10:09:58,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:09:58,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:09:58,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:09:58,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:09:58,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:09:58,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:09:58" (1/1) ... [2023-04-01 10:09:58,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@773afe71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:58, skipping insertion in model container [2023-04-01 10:09:58,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:09:58" (1/1) ... [2023-04-01 10:09:58,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:09:58,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:09:58,553 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label49.c[8258,8271] [2023-04-01 10:09:59,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:09:59,200 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:09:59,223 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label49.c[8258,8271] [2023-04-01 10:09:59,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:09:59,663 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:09:59,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59 WrapperNode [2023-04-01 10:09:59,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:09:59,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:09:59,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:09:59,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:09:59,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (1/1) ... [2023-04-01 10:09:59,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (1/1) ... [2023-04-01 10:09:59,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (1/1) ... [2023-04-01 10:09:59,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (1/1) ... [2023-04-01 10:09:59,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (1/1) ... [2023-04-01 10:09:59,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (1/1) ... [2023-04-01 10:09:59,900 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (1/1) ... [2023-04-01 10:09:59,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (1/1) ... [2023-04-01 10:09:59,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:09:59,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:09:59,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:09:59,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:09:59,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (1/1) ... [2023-04-01 10:09:59,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:09:59,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:09:59,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:10:00,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:10:00,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:10:00,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:10:00,046 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:10:00,046 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:10:00,046 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:10:00,046 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:10:00,046 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:10:00,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:10:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:10:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:10:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:10:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:10:00,046 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:10:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:10:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:10:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:10:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:10:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:10:00,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:10:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:10:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:10:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:10:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:10:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:10:00,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:10:00,136 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:10:00,137 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:10:04,153 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:10:06,449 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:10:06,449 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:10:06,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:10:06 BoogieIcfgContainer [2023-04-01 10:10:06,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:10:06,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:10:06,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:10:06,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:10:06,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:09:58" (1/3) ... [2023-04-01 10:10:06,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af894c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:10:06, skipping insertion in model container [2023-04-01 10:10:06,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:09:59" (2/3) ... [2023-04-01 10:10:06,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af894c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:10:06, skipping insertion in model container [2023-04-01 10:10:06,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:10:06" (3/3) ... [2023-04-01 10:10:06,460 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label49.c [2023-04-01 10:10:06,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:10:06,474 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:10:06,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:10:06,539 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;@3615c73e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:10:06,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:10:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:10:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:10:06,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:06,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:06,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:06,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash -330926796, now seen corresponding path program 1 times [2023-04-01 10:10:06,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:06,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851371825] [2023-04-01 10:10:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:06,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:10:07,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:07,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851371825] [2023-04-01 10:10:07,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851371825] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:07,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:07,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:10:07,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57394352] [2023-04-01 10:10:07,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:07,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:10:07,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:07,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:10:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:07,129 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:10:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:10,109 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:10:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:10:10,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:10:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:10,135 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:10:10,135 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:10:10,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:10,142 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:10,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 10:10:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:10:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-04-01 10:10:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:10:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-04-01 10:10:10,234 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-04-01 10:10:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:10,235 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-04-01 10:10:10,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:10:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-04-01 10:10:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 10:10:10,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:10,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:10,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:10:10,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:10,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:10,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1552660471, now seen corresponding path program 1 times [2023-04-01 10:10:10,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:10,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595488009] [2023-04-01 10:10:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:10,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:10:10,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:10,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595488009] [2023-04-01 10:10:10,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595488009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:10,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:10,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:10:10,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715064167] [2023-04-01 10:10:10,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:10,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:10,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:10,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:10:10,477 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:10:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:14,823 INFO L93 Difference]: Finished difference Result 4183 states and 7346 transitions. [2023-04-01 10:10:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:10:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-04-01 10:10:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:14,837 INFO L225 Difference]: With dead ends: 4183 [2023-04-01 10:10:14,838 INFO L226 Difference]: Without dead ends: 2819 [2023-04-01 10:10:14,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:14,849 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2235 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4325 mSolverCounterSat, 1090 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1090 IncrementalHoareTripleChecker+Valid, 4325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:14,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2235 Valid, 140 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1090 Valid, 4325 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 10:10:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-04-01 10:10:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2751. [2023-04-01 10:10:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-04-01 10:10:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-04-01 10:10:14,961 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-04-01 10:10:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:14,961 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-04-01 10:10:14,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:10:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-04-01 10:10:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 10:10:14,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:14,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:14,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:10:14,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:14,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash 759835099, now seen corresponding path program 1 times [2023-04-01 10:10:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:14,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078844169] [2023-04-01 10:10:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:14,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:10:15,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:15,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078844169] [2023-04-01 10:10:15,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078844169] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:15,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:15,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:10:15,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327543243] [2023-04-01 10:10:15,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:15,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:15,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:15,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:15,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:10:15,184 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:10:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:19,823 INFO L93 Difference]: Finished difference Result 8433 states and 13565 transitions. [2023-04-01 10:10:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:10:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-04-01 10:10:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:19,866 INFO L225 Difference]: With dead ends: 8433 [2023-04-01 10:10:19,866 INFO L226 Difference]: Without dead ends: 5687 [2023-04-01 10:10:19,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:19,876 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2123 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:19,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 118 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 10:10:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2023-04-01 10:10:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5570. [2023-04-01 10:10:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5445 states have (on average 1.5074380165289256) internal successors, (8208), 5471 states have internal predecessors, (8208), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (413), 71 states have call predecessors, (413), 26 states have call successors, (413) [2023-04-01 10:10:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 8648 transitions. [2023-04-01 10:10:19,996 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 8648 transitions. Word has length 41 [2023-04-01 10:10:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:19,997 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 8648 transitions. [2023-04-01 10:10:19,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:10:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 8648 transitions. [2023-04-01 10:10:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:10:20,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:20,001 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] [2023-04-01 10:10:20,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:10:20,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:20,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:20,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2022691981, now seen corresponding path program 1 times [2023-04-01 10:10:20,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:20,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971670637] [2023-04-01 10:10:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:20,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:10:20,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:20,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971670637] [2023-04-01 10:10:20,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971670637] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:20,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234527866] [2023-04-01 10:10:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:20,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:20,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:20,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:10:20,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:10:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:20,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:10:20,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:10:20,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:10:20,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234527866] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:20,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:10:20,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:10:20,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625816784] [2023-04-01 10:10:20,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:20,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:20,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:20,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:20,341 INFO L87 Difference]: Start difference. First operand 5570 states and 8648 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:10:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:23,832 INFO L93 Difference]: Finished difference Result 16768 states and 27174 transitions. [2023-04-01 10:10:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:10:23,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-04-01 10:10:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:23,870 INFO L225 Difference]: With dead ends: 16768 [2023-04-01 10:10:23,870 INFO L226 Difference]: Without dead ends: 11203 [2023-04-01 10:10:23,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:10:23,885 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:23,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 10:10:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2023-04-01 10:10:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 9834. [2023-04-01 10:10:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9575 states have (on average 1.370130548302872) internal successors, (13119), 9640 states have internal predecessors, (13119), 47 states have call successors, (47), 47 states have call predecessors, (47), 211 states have return successors, (1286), 146 states have call predecessors, (1286), 46 states have call successors, (1286) [2023-04-01 10:10:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 14452 transitions. [2023-04-01 10:10:24,093 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 14452 transitions. Word has length 42 [2023-04-01 10:10:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:24,094 INFO L495 AbstractCegarLoop]: Abstraction has 9834 states and 14452 transitions. [2023-04-01 10:10:24,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:10:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 14452 transitions. [2023-04-01 10:10:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 10:10:24,097 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:24,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:24,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:10:24,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:24,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:24,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1666428042, now seen corresponding path program 1 times [2023-04-01 10:10:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:24,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943249943] [2023-04-01 10:10:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:10:24,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:24,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943249943] [2023-04-01 10:10:24,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943249943] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:24,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111081259] [2023-04-01 10:10:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:24,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:24,487 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) [2023-04-01 10:10:24,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:10:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:24,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:10:24,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:10:24,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:10:24,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111081259] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:24,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:10:24,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:10:24,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877007640] [2023-04-01 10:10:24,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:24,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:10:24,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:10:24,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:10:24,643 INFO L87 Difference]: Start difference. First operand 9834 states and 14452 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:10:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:28,595 INFO L93 Difference]: Finished difference Result 24791 states and 37431 transitions. [2023-04-01 10:10:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:10:28,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-04-01 10:10:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:28,652 INFO L225 Difference]: With dead ends: 24791 [2023-04-01 10:10:28,652 INFO L226 Difference]: Without dead ends: 14962 [2023-04-01 10:10:28,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:10:28,674 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:28,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:10:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2023-04-01 10:10:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 14607. [2023-04-01 10:10:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14607 states, 14159 states have (on average 1.2818701885726393) internal successors, (18150), 14285 states have internal predecessors, (18150), 68 states have call successors, (68), 68 states have call predecessors, (68), 379 states have return successors, (2708), 253 states have call predecessors, (2708), 67 states have call successors, (2708) [2023-04-01 10:10:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14607 states to 14607 states and 20926 transitions. [2023-04-01 10:10:28,960 INFO L78 Accepts]: Start accepts. Automaton has 14607 states and 20926 transitions. Word has length 45 [2023-04-01 10:10:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:28,961 INFO L495 AbstractCegarLoop]: Abstraction has 14607 states and 20926 transitions. [2023-04-01 10:10:28,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:10:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 14607 states and 20926 transitions. [2023-04-01 10:10:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 10:10:28,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:28,967 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:10:28,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 10:10:29,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:29,190 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:29,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:29,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2120198741, now seen corresponding path program 1 times [2023-04-01 10:10:29,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:29,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246644393] [2023-04-01 10:10:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:29,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 10:10:29,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:29,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246644393] [2023-04-01 10:10:29,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246644393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:29,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:10:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435192754] [2023-04-01 10:10:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:10:29,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:10:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:29,336 INFO L87 Difference]: Start difference. First operand 14607 states and 20926 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:10:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:32,346 INFO L93 Difference]: Finished difference Result 30621 states and 45209 transitions. [2023-04-01 10:10:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:10:32,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-01 10:10:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:32,391 INFO L225 Difference]: With dead ends: 30621 [2023-04-01 10:10:32,392 INFO L226 Difference]: Without dead ends: 16019 [2023-04-01 10:10:32,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:32,425 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 691 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:32,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1187 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 10:10:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2023-04-01 10:10:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 15818. [2023-04-01 10:10:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15818 states, 15361 states have (on average 1.2357268407004753) internal successors, (18982), 15488 states have internal predecessors, (18982), 73 states have call successors, (73), 73 states have call predecessors, (73), 383 states have return successors, (2724), 256 states have call predecessors, (2724), 72 states have call successors, (2724) [2023-04-01 10:10:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15818 states to 15818 states and 21779 transitions. [2023-04-01 10:10:32,705 INFO L78 Accepts]: Start accepts. Automaton has 15818 states and 21779 transitions. Word has length 79 [2023-04-01 10:10:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:32,706 INFO L495 AbstractCegarLoop]: Abstraction has 15818 states and 21779 transitions. [2023-04-01 10:10:32,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:10:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 15818 states and 21779 transitions. [2023-04-01 10:10:32,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 10:10:32,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:32,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 10:10:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:10:32,708 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:32,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:32,709 INFO L85 PathProgramCache]: Analyzing trace with hash -794045610, now seen corresponding path program 1 times [2023-04-01 10:10:32,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:32,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835073146] [2023-04-01 10:10:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 10:10:32,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:32,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835073146] [2023-04-01 10:10:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835073146] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:10:32,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:10:32,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:10:32,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577849536] [2023-04-01 10:10:32,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:10:32,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:10:32,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:10:32,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:10:32,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:32,845 INFO L87 Difference]: Start difference. First operand 15818 states and 21779 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:10:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:10:35,998 INFO L93 Difference]: Finished difference Result 36536 states and 51969 transitions. [2023-04-01 10:10:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:10:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 93 [2023-04-01 10:10:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:10:36,059 INFO L225 Difference]: With dead ends: 36536 [2023-04-01 10:10:36,059 INFO L226 Difference]: Without dead ends: 20723 [2023-04-01 10:10:36,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:10:36,092 INFO L413 NwaCegarLoop]: 1235 mSDtfsCounter, 677 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:10:36,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1263 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 10:10:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20723 states. [2023-04-01 10:10:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20723 to 20559. [2023-04-01 10:10:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 19994 states have (on average 1.2070121036310892) internal successors, (24133), 20152 states have internal predecessors, (24133), 94 states have call successors, (94), 94 states have call predecessors, (94), 470 states have return successors, (3808), 312 states have call predecessors, (3808), 93 states have call successors, (3808) [2023-04-01 10:10:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 28035 transitions. [2023-04-01 10:10:36,446 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 28035 transitions. Word has length 93 [2023-04-01 10:10:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:10:36,446 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 28035 transitions. [2023-04-01 10:10:36,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:10:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 28035 transitions. [2023-04-01 10:10:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 10:10:36,448 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:10:36,448 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:10:36,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 10:10:36,449 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:10:36,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:10:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1668194562, now seen corresponding path program 1 times [2023-04-01 10:10:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:10:36,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819002931] [2023-04-01 10:10:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:36,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:10:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:10:36,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:10:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819002931] [2023-04-01 10:10:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819002931] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:10:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917450220] [2023-04-01 10:10:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:10:36,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:10:36,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:10:36,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:10:36,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:10:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:10:36,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:10:36,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:10:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:10:36,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:10:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:10:36,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917450220] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:10:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390999776] [2023-04-01 10:10:37,015 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-01 10:10:37,015 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:10:37,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:10:37,021 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:10:37,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:10:37,309 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 81 for LOIs [2023-04-01 10:10:37,663 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2023-04-01 10:10:38,004 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8318 conjuctions. This might take some time... [2023-04-01 10:10:38,133 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 35 conjuctions. [2023-04-01 10:10:40,954 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 10:10:41,249 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 102209 conjuctions. This might take some time...