/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_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:07:35,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:07:35,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:07:35,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:07:35,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:07:35,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:07:35,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:07:35,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:07:35,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:07:35,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:07:35,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:07:35,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:07:35,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:07:35,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:07:35,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:07:35,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:07:35,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:07:35,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:07:35,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:07:35,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:07:35,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:07:35,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:07:35,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:07:35,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:07:35,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:07:35,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:07:35,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:07:35,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:07:35,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:07:35,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:07:35,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:07:35,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:07:35,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:07:35,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:07:35,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:07:35,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:07:35,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:07:35,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:07:35,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:07:35,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:07:35,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:07:35,126 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 10:07:35,162 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:07:35,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:07:35,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:07:35,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:07:35,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:07:35,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:07:35,164 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:07:35,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:07:35,165 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:07:35,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:07:35,165 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:07:35,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:07:35,166 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:07:35,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:07:35,166 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:07:35,166 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:07:35,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:07:35,166 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:07:35,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:07:35,167 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:07:35,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:07:35,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:07:35,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:07:35,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:07:35,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:07:35,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:07:35,169 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:07:35,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:07:35,169 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:07:35,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:07:35,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:07:35,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:07:35,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:07:35,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:07:35,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:07:35,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:07:35,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:07:35,170 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:07:35,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:07:35,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:07:35,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:07:35,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:07:35,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:07:35,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:07:35,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:07:35,422 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:07:35,423 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:07:35,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2023-04-01 10:07:36,653 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:07:37,129 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:07:37,129 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2023-04-01 10:07:37,160 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc6bd25eb/16c476f9f597468587d09e97ad17eb1c/FLAG316eb725f [2023-04-01 10:07:37,176 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc6bd25eb/16c476f9f597468587d09e97ad17eb1c [2023-04-01 10:07:37,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:07:37,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:07:37,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:07:37,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:07:37,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:07:37,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:07:37" (1/1) ... [2023-04-01 10:07:37,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b34dcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:37, skipping insertion in model container [2023-04-01 10:07:37,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:07:37" (1/1) ... [2023-04-01 10:07:37,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:07:37,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:07:37,608 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_label16.c[3388,3401] [2023-04-01 10:07:38,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:07:38,385 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:07:38,414 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_label16.c[3388,3401] [2023-04-01 10:07:38,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:07:38,873 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:07:38,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38 WrapperNode [2023-04-01 10:07:38,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:07:38,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:07:38,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:07:38,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:07:38,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (1/1) ... [2023-04-01 10:07:38,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (1/1) ... [2023-04-01 10:07:38,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (1/1) ... [2023-04-01 10:07:38,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (1/1) ... [2023-04-01 10:07:39,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (1/1) ... [2023-04-01 10:07:39,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (1/1) ... [2023-04-01 10:07:39,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (1/1) ... [2023-04-01 10:07:39,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (1/1) ... [2023-04-01 10:07:39,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:07:39,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:07:39,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:07:39,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:07:39,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (1/1) ... [2023-04-01 10:07:39,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:07:39,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:07:39,271 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 10:07:39,282 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 10:07:39,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:07:39,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:07:39,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:07:39,312 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:07:39,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:07:39,376 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:07:39,376 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:07:39,376 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:07:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:07:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:07:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:07:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:07:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:07:39,376 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:07:39,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:07:39,467 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:07:39,470 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:07:44,529 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:07:47,548 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:07:47,548 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:07:47,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:07:47 BoogieIcfgContainer [2023-04-01 10:07:47,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:07:47,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:07:47,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:07:47,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:07:47,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:07:37" (1/3) ... [2023-04-01 10:07:47,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afabced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:07:47, skipping insertion in model container [2023-04-01 10:07:47,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:38" (2/3) ... [2023-04-01 10:07:47,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afabced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:07:47, skipping insertion in model container [2023-04-01 10:07:47,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:07:47" (3/3) ... [2023-04-01 10:07:47,566 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label16.c [2023-04-01 10:07:47,584 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:07:47,584 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:07:47,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:07:47,667 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;@52de000c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:07:47,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:07:47,678 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 10:07:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:07:47,684 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:07:47,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:07:47,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:07:47,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:07:47,692 INFO L85 PathProgramCache]: Analyzing trace with hash -134422507, now seen corresponding path program 1 times [2023-04-01 10:07:47,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:07:47,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377486805] [2023-04-01 10:07:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:07:47,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:07:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:07:48,077 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 10:07:48,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:07:48,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377486805] [2023-04-01 10:07:48,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377486805] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:07:48,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:07:48,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:07:48,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359866767] [2023-04-01 10:07:48,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:07:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:07:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:07:48,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:07:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:07:48,124 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 10:07:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:07:51,607 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:07:51,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:07:51,609 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 10:07:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:07:51,632 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:07:51,632 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:07:51,640 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 10:07:51,643 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 735 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:07:51,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 178 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 10:07:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:07:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 10:07:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.8574610244988865) internal successors, (2502), 1347 states have internal predecessors, (2502), 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 10:07:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-04-01 10:07:51,731 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-04-01 10:07:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:07:51,731 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-04-01 10:07:51,731 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 10:07:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-04-01 10:07:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:07:51,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:07:51,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:07:51,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:07:51,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:07:51,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:07:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash 242957030, now seen corresponding path program 1 times [2023-04-01 10:07:51,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:07:51,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701786418] [2023-04-01 10:07:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:07:51,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:07:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:07:51,943 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 10:07:51,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:07:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701786418] [2023-04-01 10:07:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701786418] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:07:51,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:07:51,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:07:51,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891271145] [2023-04-01 10:07:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:07:51,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:07:51,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:07:51,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:07:51,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:07:51,946 INFO L87 Difference]: Start difference. First operand 1365 states and 2525 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:07:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:07:56,476 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-04-01 10:07:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:07:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 10:07:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:07:56,491 INFO L225 Difference]: With dead ends: 4150 [2023-04-01 10:07:56,492 INFO L226 Difference]: Without dead ends: 2790 [2023-04-01 10:07:56,495 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 10:07:56,497 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:07:56,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 109 Invalid, 4908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 10:07:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-01 10:07:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-04-01 10:07:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2702 states have (on average 1.5906735751295338) internal successors, (4298), 2708 states have internal predecessors, (4298), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (79), 25 states have call predecessors, (79), 14 states have call successors, (79) [2023-04-01 10:07:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-04-01 10:07:56,570 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-04-01 10:07:56,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:07:56,571 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-04-01 10:07:56,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:07:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-04-01 10:07:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 10:07:56,572 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:07:56,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:07:56,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:07:56,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:07:56,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:07:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1338041918, now seen corresponding path program 1 times [2023-04-01 10:07:56,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:07:56,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105117483] [2023-04-01 10:07:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:07:56,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:07:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:07:56,747 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 10:07:56,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:07:56,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105117483] [2023-04-01 10:07:56,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105117483] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:07:56,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:07:56,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:07:56,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465165988] [2023-04-01 10:07:56,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:07:56,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:07:56,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:07:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:07:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:07:56,752 INFO L87 Difference]: Start difference. First operand 2749 states and 4392 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 10:08:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:01,466 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-04-01 10:08:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:08:01,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 10:08:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:01,495 INFO L225 Difference]: With dead ends: 8429 [2023-04-01 10:08:01,496 INFO L226 Difference]: Without dead ends: 5685 [2023-04-01 10:08:01,564 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 10:08:01,565 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:01,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 10:08:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-04-01 10:08:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-04-01 10:08:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5490 states have (on average 1.3936247723132968) internal successors, (7651), 5522 states have internal predecessors, (7651), 27 states have call successors, (27), 27 states have call predecessors, (27), 116 states have return successors, (373), 84 states have call predecessors, (373), 26 states have call successors, (373) [2023-04-01 10:08:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-04-01 10:08:01,737 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-04-01 10:08:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:01,738 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-04-01 10:08:01,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 10:08:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-04-01 10:08:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 10:08:01,740 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:01,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:01,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:08:01,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:01,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:01,741 INFO L85 PathProgramCache]: Analyzing trace with hash 372110531, now seen corresponding path program 1 times [2023-04-01 10:08:01,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:01,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74902525] [2023-04-01 10:08:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:01,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:08:01,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74902525] [2023-04-01 10:08:01,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74902525] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905251268] [2023-04-01 10:08:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:01,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:01,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:08:01,945 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 10:08:01,977 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 10:08:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:02,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:08:02,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:08:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:08:02,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:08:02,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905251268] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:02,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:08:02,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:08:02,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794669169] [2023-04-01 10:08:02,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:02,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:08:02,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:08:02,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:08:02,247 INFO L87 Difference]: Start difference. First operand 5634 states and 8051 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 10:08:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:06,901 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-04-01 10:08:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:08:06,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 41 [2023-04-01 10:08:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:06,944 INFO L225 Difference]: With dead ends: 17148 [2023-04-01 10:08:06,945 INFO L226 Difference]: Without dead ends: 11519 [2023-04-01 10:08:06,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 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 10:08:06,958 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:06,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 10:08:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-04-01 10:08:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-04-01 10:08:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10645 states, 10328 states have (on average 1.2570681642137878) internal successors, (12983), 10410 states have internal predecessors, (12983), 49 states have call successors, (49), 49 states have call predecessors, (49), 267 states have return successors, (1161), 185 states have call predecessors, (1161), 48 states have call successors, (1161) [2023-04-01 10:08:07,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14193 transitions. [2023-04-01 10:08:07,216 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14193 transitions. Word has length 41 [2023-04-01 10:08:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:07,216 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14193 transitions. [2023-04-01 10:08:07,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 10:08:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14193 transitions. [2023-04-01 10:08:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 10:08:07,225 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:07,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:07,241 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 10:08:07,431 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 10:08:07,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:07,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash 67558718, now seen corresponding path program 1 times [2023-04-01 10:08:07,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:07,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511937525] [2023-04-01 10:08:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:07,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:08:07,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:07,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511937525] [2023-04-01 10:08:07,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511937525] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:07,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056847605] [2023-04-01 10:08:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:07,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:07,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:08:07,921 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 10:08:07,925 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 10:08:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:08,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 10:08:08,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:08:08,156 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 10:08:08,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:08:08,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056847605] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:08,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:08:08,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-01 10:08:08,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921333156] [2023-04-01 10:08:08,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:08,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:08:08,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:08,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:08:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:08:08,158 INFO L87 Difference]: Start difference. First operand 10645 states and 14193 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 10:08:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:12,012 INFO L93 Difference]: Finished difference Result 19718 states and 26889 transitions. [2023-04-01 10:08:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:08:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 70 [2023-04-01 10:08:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:12,061 INFO L225 Difference]: With dead ends: 19718 [2023-04-01 10:08:12,061 INFO L226 Difference]: Without dead ends: 11456 [2023-04-01 10:08:12,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:08:12,081 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1952 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4517 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1952 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 4655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:12,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1952 Valid, 117 Invalid, 4655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4517 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:08:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11456 states. [2023-04-01 10:08:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11456 to 11052. [2023-04-01 10:08:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 10677 states have (on average 1.2482907183665823) internal successors, (13328), 10787 states have internal predecessors, (13328), 50 states have call successors, (50), 50 states have call predecessors, (50), 324 states have return successors, (1302), 214 states have call predecessors, (1302), 49 states have call successors, (1302) [2023-04-01 10:08:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 14680 transitions. [2023-04-01 10:08:12,341 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 14680 transitions. Word has length 70 [2023-04-01 10:08:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:12,343 INFO L495 AbstractCegarLoop]: Abstraction has 11052 states and 14680 transitions. [2023-04-01 10:08:12,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 10:08:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 14680 transitions. [2023-04-01 10:08:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 10:08:12,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:12,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:12,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:08:12,553 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 10:08:12,554 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:12,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:12,554 INFO L85 PathProgramCache]: Analyzing trace with hash -838641500, now seen corresponding path program 1 times [2023-04-01 10:08:12,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:12,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397798033] [2023-04-01 10:08:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:12,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:08:12,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:12,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397798033] [2023-04-01 10:08:12,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397798033] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:12,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:08:12,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:08:12,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586356190] [2023-04-01 10:08:12,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:12,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:08:12,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:08:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:08:12,712 INFO L87 Difference]: Start difference. First operand 11052 states and 14680 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 10:08:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:15,831 INFO L93 Difference]: Finished difference Result 23504 states and 32509 transitions. [2023-04-01 10:08:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:08:15,833 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 75 [2023-04-01 10:08:15,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:15,884 INFO L225 Difference]: With dead ends: 23504 [2023-04-01 10:08:15,885 INFO L226 Difference]: Without dead ends: 13106 [2023-04-01 10:08:15,910 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 10:08:15,911 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 852 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:15,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 987 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 10:08:15,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13106 states. [2023-04-01 10:08:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13106 to 13042. [2023-04-01 10:08:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13042 states, 12646 states have (on average 1.228847066266013) internal successors, (15540), 12759 states have internal predecessors, (15540), 59 states have call successors, (59), 59 states have call predecessors, (59), 336 states have return successors, (1489), 223 states have call predecessors, (1489), 58 states have call successors, (1489) [2023-04-01 10:08:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13042 states to 13042 states and 17088 transitions. [2023-04-01 10:08:16,210 INFO L78 Accepts]: Start accepts. Automaton has 13042 states and 17088 transitions. Word has length 75 [2023-04-01 10:08:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:16,212 INFO L495 AbstractCegarLoop]: Abstraction has 13042 states and 17088 transitions. [2023-04-01 10:08:16,212 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 10:08:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 13042 states and 17088 transitions. [2023-04-01 10:08:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 10:08:16,214 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:16,215 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 10:08:16,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:08:16,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:16,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1408784508, now seen corresponding path program 1 times [2023-04-01 10:08:16,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:16,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985250627] [2023-04-01 10:08:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:16,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:16,405 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 10:08:16,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:16,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985250627] [2023-04-01 10:08:16,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985250627] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:16,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:08:16,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:08:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123321383] [2023-04-01 10:08:16,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:16,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:08:16,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:08:16,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:08:16,408 INFO L87 Difference]: Start difference. First operand 13042 states and 17088 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 10:08:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:19,678 INFO L93 Difference]: Finished difference Result 32326 states and 44748 transitions. [2023-04-01 10:08:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:08:19,678 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 10:08:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:19,767 INFO L225 Difference]: With dead ends: 32326 [2023-04-01 10:08:19,767 INFO L226 Difference]: Without dead ends: 19938 [2023-04-01 10:08:19,802 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 10:08:19,803 INFO L413 NwaCegarLoop]: 1236 mSDtfsCounter, 674 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:19,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 1264 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 10:08:19,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19938 states. [2023-04-01 10:08:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19938 to 19774. [2023-04-01 10:08:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19774 states, 19254 states have (on average 1.18266334268204) internal successors, (22771), 19396 states have internal predecessors, (22771), 89 states have call successors, (89), 89 states have call predecessors, (89), 430 states have return successors, (2607), 288 states have call predecessors, (2607), 88 states have call successors, (2607) [2023-04-01 10:08:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19774 states to 19774 states and 25467 transitions. [2023-04-01 10:08:20,323 INFO L78 Accepts]: Start accepts. Automaton has 19774 states and 25467 transitions. Word has length 79 [2023-04-01 10:08:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:20,325 INFO L495 AbstractCegarLoop]: Abstraction has 19774 states and 25467 transitions. [2023-04-01 10:08:20,325 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 10:08:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 19774 states and 25467 transitions. [2023-04-01 10:08:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 10:08:20,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:20,328 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:20,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 10:08:20,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:20,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash -192181067, now seen corresponding path program 1 times [2023-04-01 10:08:20,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:20,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415201165] [2023-04-01 10:08:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 10:08:20,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:20,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415201165] [2023-04-01 10:08:20,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415201165] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:20,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236415799] [2023-04-01 10:08:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:20,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:20,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:08:20,552 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 10:08:20,577 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 10:08:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:20,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 10:08:20,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:08:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 10:08:20,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:08:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 10:08:21,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236415799] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:21,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:08:21,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 10:08:21,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431690696] [2023-04-01 10:08:21,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:21,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:08:21,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:21,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:08:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:08:21,162 INFO L87 Difference]: Start difference. First operand 19774 states and 25467 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:08:25,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:25,156 INFO L93 Difference]: Finished difference Result 55249 states and 73903 transitions. [2023-04-01 10:08:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:08:25,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 85 [2023-04-01 10:08:25,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:25,268 INFO L225 Difference]: With dead ends: 55249 [2023-04-01 10:08:25,269 INFO L226 Difference]: Without dead ends: 36114 [2023-04-01 10:08:25,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-04-01 10:08:25,324 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1619 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 4618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:25,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1619 Valid, 99 Invalid, 4618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 10:08:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36114 states. [2023-04-01 10:08:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36114 to 35333. [2023-04-01 10:08:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35333 states, 34213 states have (on average 1.1534796714699092) internal successors, (39464), 34568 states have internal predecessors, (39464), 156 states have call successors, (156), 156 states have call predecessors, (156), 963 states have return successors, (5961), 608 states have call predecessors, (5961), 155 states have call successors, (5961) [2023-04-01 10:08:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35333 states to 35333 states and 45581 transitions. [2023-04-01 10:08:26,004 INFO L78 Accepts]: Start accepts. Automaton has 35333 states and 45581 transitions. Word has length 85 [2023-04-01 10:08:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:26,007 INFO L495 AbstractCegarLoop]: Abstraction has 35333 states and 45581 transitions. [2023-04-01 10:08:26,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:08:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35333 states and 45581 transitions. [2023-04-01 10:08:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 10:08:26,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:26,013 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 10:08:26,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 10:08:26,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:26,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:26,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1218376391, now seen corresponding path program 1 times [2023-04-01 10:08:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:26,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823509707] [2023-04-01 10:08:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:26,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:26,388 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 10:08:26,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:26,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823509707] [2023-04-01 10:08:26,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823509707] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:26,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276626918] [2023-04-01 10:08:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:26,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:26,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:08:26,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:08:26,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 10:08:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:26,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:08:26,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:08:26,575 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 10:08:26,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:08:26,678 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 10:08:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276626918] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:08:26,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243187563] [2023-04-01 10:08:26,724 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-01 10:08:26,724 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:08:26,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:08:26,738 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:08:26,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:08:27,304 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 81 for LOIs [2023-04-01 10:08:27,504 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16