/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:09:37,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:09:37,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:09:37,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:09:37,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:09:37,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:09:37,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:09:37,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:09:37,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:09:37,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:09:37,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:09:37,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:09:37,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:09:37,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:09:37,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:09:37,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:09:37,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:09:37,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:09:37,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:09:37,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:09:37,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:09:37,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:09:37,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:09:37,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:09:37,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:09:37,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:09:37,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:09:37,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:09:37,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:09:37,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:09:37,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:09:37,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:09:37,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:09:37,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:09:37,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:09:37,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:09:37,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:09:37,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:09:37,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:09:37,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:09:37,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:09:37,220 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 [2023-04-02 20:09:37,247 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:09:37,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:09:37,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:09:37,248 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:09:37,249 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:09:37,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:09:37,249 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:09:37,250 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:09:37,250 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:09:37,250 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:09:37,251 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:09:37,251 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:09:37,251 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:09:37,251 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:09:37,251 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:09:37,251 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:09:37,251 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:09:37,252 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:09:37,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:09:37,252 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:09:37,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:09:37,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:09:37,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:09:37,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:09:37,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:09:37,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:09:37,253 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:09:37,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:09:37,254 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:09:37,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:09:37,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:09:37,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:09:37,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:09:37,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:09:37,255 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:09:37,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:09:37,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:09:37,255 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:09:37,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:09:37,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:09:37,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:09:37,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:09:37,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:09:37,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:09:37,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:09:37,513 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:09:37,513 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:09:37,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label30.c [2023-04-02 20:09:38,769 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:09:39,122 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:09:39,123 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label30.c [2023-04-02 20:09:39,137 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509b569fe/75ce70ce050746c888438c3bbbe96f3f/FLAGf52334816 [2023-04-02 20:09:39,153 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509b569fe/75ce70ce050746c888438c3bbbe96f3f [2023-04-02 20:09:39,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:09:39,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:09:39,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:09:39,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:09:39,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:09:39,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:39,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@254f7bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39, skipping insertion in model container [2023-04-02 20:09:39,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:39,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:09:39,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:09:39,367 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/Problem16_label30.c[1812,1825] [2023-04-02 20:09:39,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:09:39,769 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:09:39,787 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/Problem16_label30.c[1812,1825] [2023-04-02 20:09:39,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:09:39,971 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:09:39,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39 WrapperNode [2023-04-02 20:09:39,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:09:39,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:09:39,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:09:39,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:09:39,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:39,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:40,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:40,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:40,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:40,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:40,096 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:40,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:40,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:09:40,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:09:40,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:09:40,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:09:40,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (1/1) ... [2023-04-02 20:09:40,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:09:40,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:09:40,143 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) [2023-04-02 20:09:40,162 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 [2023-04-02 20:09:40,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:09:40,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:09:40,177 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:09:40,178 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:09:40,178 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:09:40,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:09:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:09:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:09:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:09:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:09:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:09:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:09:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:09:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:09:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:09:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:09:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:09:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:09:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:09:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:09:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:09:40,262 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:09:40,264 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:09:42,044 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:09:43,039 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:09:43,040 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:09:43,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:09:43 BoogieIcfgContainer [2023-04-02 20:09:43,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:09:43,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:09:43,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:09:43,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:09:43,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:09:39" (1/3) ... [2023-04-02 20:09:43,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e57509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:09:43, skipping insertion in model container [2023-04-02 20:09:43,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:09:39" (2/3) ... [2023-04-02 20:09:43,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e57509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:09:43, skipping insertion in model container [2023-04-02 20:09:43,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:09:43" (3/3) ... [2023-04-02 20:09:43,051 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label30.c [2023-04-02 20:09:43,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:09:43,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:09:43,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:09:43,127 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;@4eaa259b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:09:43,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:09:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 20:09:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:09:43,140 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:09:43,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:09:43,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:09:43,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:09:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash -706741146, now seen corresponding path program 1 times [2023-04-02 20:09:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:09:43,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10387583] [2023-04-02 20:09:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:09:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:09:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:09:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:09:43,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:09:43,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10387583] [2023-04-02 20:09:43,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10387583] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:09:43,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:09:43,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:09:43,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83840554] [2023-04-02 20:09:43,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:09:43,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:09:43,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:09:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:09:43,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:09:43,499 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:09:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:09:44,867 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-02 20:09:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:09:44,869 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 [2023-04-02 20:09:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:09:44,881 INFO L225 Difference]: With dead ends: 718 [2023-04-02 20:09:44,882 INFO L226 Difference]: Without dead ends: 471 [2023-04-02 20:09:44,887 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 [2023-04-02 20:09:44,893 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:09:44,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 90 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 20:09:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-02 20:09:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 468. [2023-04-02 20:09:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 458 states have (on average 1.8384279475982532) internal successors, (842), 458 states have internal predecessors, (842), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-02 20:09:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 853 transitions. [2023-04-02 20:09:44,965 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 853 transitions. Word has length 11 [2023-04-02 20:09:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:09:44,965 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 853 transitions. [2023-04-02 20:09:44,966 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) [2023-04-02 20:09:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 853 transitions. [2023-04-02 20:09:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 20:09:44,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:09:44,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:09:44,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:09:44,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:09:44,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:09:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2053975288, now seen corresponding path program 1 times [2023-04-02 20:09:44,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:09:44,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648179641] [2023-04-02 20:09:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:09:44,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:09:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:09:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:09:45,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:09:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648179641] [2023-04-02 20:09:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648179641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:09:45,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:09:45,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:09:45,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744274692] [2023-04-02 20:09:45,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:09:45,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:09:45,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:09:45,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:09:45,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:09:45,157 INFO L87 Difference]: Start difference. First operand 468 states and 853 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-04-02 20:09:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:09:46,526 INFO L93 Difference]: Finished difference Result 1410 states and 2605 transitions. [2023-04-02 20:09:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:09:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-04-02 20:09:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:09:46,534 INFO L225 Difference]: With dead ends: 1410 [2023-04-02 20:09:46,534 INFO L226 Difference]: Without dead ends: 947 [2023-04-02 20:09:46,536 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 [2023-04-02 20:09:46,537 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 889 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:09:46,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 20:09:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-04-02 20:09:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 924. [2023-04-02 20:09:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 906 states have (on average 1.7339955849889626) internal successors, (1571), 910 states have internal predecessors, (1571), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-02 20:09:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1604 transitions. [2023-04-02 20:09:46,598 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1604 transitions. Word has length 22 [2023-04-02 20:09:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:09:46,598 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1604 transitions. [2023-04-02 20:09:46,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-04-02 20:09:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1604 transitions. [2023-04-02 20:09:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 20:09:46,599 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:09:46,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:09:46,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:09:46,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:09:46,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:09:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash 482795995, now seen corresponding path program 1 times [2023-04-02 20:09:46,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:09:46,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735113892] [2023-04-02 20:09:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:09:46,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:09:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:09:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:09:46,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:09:46,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735113892] [2023-04-02 20:09:46,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735113892] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:09:46,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:09:46,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:09:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005015940] [2023-04-02 20:09:46,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:09:46,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:09:46,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:09:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:09:46,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:09:46,712 INFO L87 Difference]: Start difference. First operand 924 states and 1604 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) [2023-04-02 20:09:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:09:48,137 INFO L93 Difference]: Finished difference Result 2556 states and 4514 transitions. [2023-04-02 20:09:48,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:09:48,138 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 [2023-04-02 20:09:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:09:48,151 INFO L225 Difference]: With dead ends: 2556 [2023-04-02 20:09:48,151 INFO L226 Difference]: Without dead ends: 1637 [2023-04-02 20:09:48,157 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 [2023-04-02 20:09:48,160 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:09:48,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 20:09:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-04-02 20:09:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1605. [2023-04-02 20:09:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1573 states have (on average 1.477431659249841) internal successors, (2324), 1583 states have internal predecessors, (2324), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (69), 10 states have call predecessors, (69), 10 states have call successors, (69) [2023-04-02 20:09:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2404 transitions. [2023-04-02 20:09:48,210 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2404 transitions. Word has length 23 [2023-04-02 20:09:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:09:48,211 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 2404 transitions. [2023-04-02 20:09:48,211 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) [2023-04-02 20:09:48,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2404 transitions. [2023-04-02 20:09:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-02 20:09:48,213 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:09:48,213 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-04-02 20:09:48,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 20:09:48,214 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:09:48,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:09:48,214 INFO L85 PathProgramCache]: Analyzing trace with hash 996720695, now seen corresponding path program 1 times [2023-04-02 20:09:48,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:09:48,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97748609] [2023-04-02 20:09:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:09:48,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:09:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:09:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 20:09:48,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:09:48,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97748609] [2023-04-02 20:09:48,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97748609] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:09:48,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:09:48,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:09:48,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111939281] [2023-04-02 20:09:48,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:09:48,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:09:48,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:09:48,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:09:48,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:09:48,389 INFO L87 Difference]: Start difference. First operand 1605 states and 2404 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-04-02 20:09:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:09:49,568 INFO L93 Difference]: Finished difference Result 4561 states and 6803 transitions. [2023-04-02 20:09:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:09:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 92 [2023-04-02 20:09:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:09:49,583 INFO L225 Difference]: With dead ends: 4561 [2023-04-02 20:09:49,583 INFO L226 Difference]: Without dead ends: 2961 [2023-04-02 20:09:49,588 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 [2023-04-02 20:09:49,597 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 20:09:49,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 476 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 20:09:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2023-04-02 20:09:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2913. [2023-04-02 20:09:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2866 states have (on average 1.3080949057920446) internal successors, (3749), 2879 states have internal predecessors, (3749), 17 states have call successors, (17), 17 states have call predecessors, (17), 29 states have return successors, (145), 16 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-02 20:09:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 3911 transitions. [2023-04-02 20:09:49,697 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 3911 transitions. Word has length 92 [2023-04-02 20:09:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:09:49,698 INFO L495 AbstractCegarLoop]: Abstraction has 2913 states and 3911 transitions. [2023-04-02 20:09:49,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-04-02 20:09:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 3911 transitions. [2023-04-02 20:09:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-02 20:09:49,701 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:09:49,702 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, 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] [2023-04-02 20:09:49,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 20:09:49,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:09:49,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:09:49,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1435910115, now seen corresponding path program 1 times [2023-04-02 20:09:49,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:09:49,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687942596] [2023-04-02 20:09:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:09:49,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:09:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:09:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:09:49,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:09:49,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687942596] [2023-04-02 20:09:49,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687942596] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:09:49,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:09:49,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:09:49,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770674237] [2023-04-02 20:09:49,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:09:49,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:09:49,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:09:49,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:09:49,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:09:49,942 INFO L87 Difference]: Start difference. First operand 2913 states and 3911 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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) [2023-04-02 20:09:51,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:09:51,402 INFO L93 Difference]: Finished difference Result 7225 states and 10000 transitions. [2023-04-02 20:09:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:09:51,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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 115 [2023-04-02 20:09:51,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:09:51,424 INFO L225 Difference]: With dead ends: 7225 [2023-04-02 20:09:51,424 INFO L226 Difference]: Without dead ends: 4317 [2023-04-02 20:09:51,432 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 [2023-04-02 20:09:51,434 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 608 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 20:09:51,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 44 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 20:09:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4317 states. [2023-04-02 20:09:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4317 to 4138. [2023-04-02 20:09:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4059 states have (on average 1.3128849470312884) internal successors, (5329), 4092 states have internal predecessors, (5329), 23 states have call successors, (23), 23 states have call predecessors, (23), 55 states have return successors, (363), 22 states have call predecessors, (363), 22 states have call successors, (363) [2023-04-02 20:09:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 5715 transitions. [2023-04-02 20:09:51,552 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 5715 transitions. Word has length 115 [2023-04-02 20:09:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:09:51,554 INFO L495 AbstractCegarLoop]: Abstraction has 4138 states and 5715 transitions. [2023-04-02 20:09:51,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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) [2023-04-02 20:09:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 5715 transitions. [2023-04-02 20:09:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-02 20:09:51,561 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:09:51,561 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, 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, 1, 1, 1] [2023-04-02 20:09:51,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 20:09:51,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:09:51,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:09:51,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1533522949, now seen corresponding path program 1 times [2023-04-02 20:09:51,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:09:51,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125796500] [2023-04-02 20:09:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:09:51,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:09:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:09:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:09:51,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:09:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125796500] [2023-04-02 20:09:51,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125796500] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:09:51,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:09:51,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:09:51,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98024939] [2023-04-02 20:09:51,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:09:51,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:09:51,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:09:51,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:09:51,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:09:51,818 INFO L87 Difference]: Start difference. First operand 4138 states and 5715 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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) [2023-04-02 20:09:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:09:53,296 INFO L93 Difference]: Finished difference Result 9662 states and 13586 transitions. [2023-04-02 20:09:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:09:53,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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 135 [2023-04-02 20:09:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:09:53,327 INFO L225 Difference]: With dead ends: 9662 [2023-04-02 20:09:53,328 INFO L226 Difference]: Without dead ends: 5529 [2023-04-02 20:09:53,336 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 [2023-04-02 20:09:53,337 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 570 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:09:53,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 44 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 20:09:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2023-04-02 20:09:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 5487. [2023-04-02 20:09:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5381 states have (on average 1.2977141795205351) internal successors, (6983), 5429 states have internal predecessors, (6983), 29 states have call successors, (29), 29 states have call predecessors, (29), 76 states have return successors, (528), 28 states have call predecessors, (528), 28 states have call successors, (528) [2023-04-02 20:09:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 7540 transitions. [2023-04-02 20:09:53,484 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 7540 transitions. Word has length 135 [2023-04-02 20:09:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:09:53,486 INFO L495 AbstractCegarLoop]: Abstraction has 5487 states and 7540 transitions. [2023-04-02 20:09:53,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 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) [2023-04-02 20:09:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 7540 transitions. [2023-04-02 20:09:53,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 20:09:53,488 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:09:53,489 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:09:53,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 20:09:53,489 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:09:53,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:09:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash -582596391, now seen corresponding path program 1 times [2023-04-02 20:09:53,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:09:53,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511248300] [2023-04-02 20:09:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:09:53,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:09:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:09:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 73 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 20:09:53,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:09:53,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511248300] [2023-04-02 20:09:53,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511248300] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:09:53,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451260044] [2023-04-02 20:09:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:09:53,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:09:53,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:09:53,765 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) [2023-04-02 20:09:53,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 20:09:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:09:53,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:09:53,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:09:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:09:54,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:09:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 73 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 20:09:54,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451260044] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:09:54,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2142916284] [2023-04-02 20:09:54,361 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-02 20:09:54,361 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:09:54,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:09:54,368 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:09:54,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:09:54,545 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-02 20:09:54,694 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-02 20:10:02,723 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 52