/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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:20:30,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:20:30,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:20:30,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:20:30,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:20:30,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:20:30,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:20:30,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:20:30,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:20:30,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:20:30,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:20:30,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:20:30,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:20:30,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:20:30,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:20:30,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:20:30,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:20:30,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:20:30,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:20:30,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:20:30,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:20:30,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:20:30,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:20:30,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:20:30,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:20:30,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:20:30,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:20:30,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:20:30,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:20:30,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:20:30,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:20:30,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:20:30,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:20:30,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:20:30,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:20:30,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:20:30,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:20:30,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:20:30,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:20:30,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:20:30,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:20:30,176 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 04:20:30,206 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:20:30,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:20:30,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:20:30,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:20:30,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:20:30,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:20:30,208 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:20:30,208 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:20:30,208 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:20:30,208 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:20:30,209 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:20:30,209 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:20:30,209 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:20:30,209 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:20:30,209 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:20:30,210 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:20:30,210 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:20:30,210 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:20:30,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:20:30,210 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:20:30,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:20:30,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:20:30,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:20:30,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:20:30,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:20:30,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:20:30,211 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:20:30,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:20:30,211 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:20:30,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:20:30,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:20:30,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:20:30,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:20:30,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:20:30,212 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:20:30,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:20:30,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:20:30,213 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:20:30,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:20:30,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:20:30,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:20:30,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:20:30,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:20:30,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:20:30,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:20:30,459 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:20:30,459 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:20:30,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label57.c [2023-04-01 04:20:31,653 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:20:31,951 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:20:31,952 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label57.c [2023-04-01 04:20:31,970 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9d65178/20d48913dd904f089bd5290bc25bbc2d/FLAG6ab0933d0 [2023-04-01 04:20:31,984 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9d65178/20d48913dd904f089bd5290bc25bbc2d [2023-04-01 04:20:31,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:20:31,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:20:31,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:20:31,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:20:31,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:20:31,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:20:31" (1/1) ... [2023-04-01 04:20:31,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2515b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:31, skipping insertion in model container [2023-04-01 04:20:31,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:20:31" (1/1) ... [2023-04-01 04:20:32,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:20:32,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:20:32,241 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_label57.c[4337,4350] [2023-04-01 04:20:32,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:20:32,599 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:20:32,625 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_label57.c[4337,4350] [2023-04-01 04:20:32,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:20:32,772 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:20:32,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32 WrapperNode [2023-04-01 04:20:32,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:20:32,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:20:32,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:20:32,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:20:32,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (1/1) ... [2023-04-01 04:20:32,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (1/1) ... [2023-04-01 04:20:32,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (1/1) ... [2023-04-01 04:20:32,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (1/1) ... [2023-04-01 04:20:32,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (1/1) ... [2023-04-01 04:20:32,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (1/1) ... [2023-04-01 04:20:32,930 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (1/1) ... [2023-04-01 04:20:32,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (1/1) ... [2023-04-01 04:20:32,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:20:32,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:20:32,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:20:32,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:20:32,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (1/1) ... [2023-04-01 04:20:32,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:20:32,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:20:32,985 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 04:20:33,007 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 04:20:33,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:20:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:20:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:20:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:20:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:20:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:20:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:20:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:20:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:20:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:20:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:20:33,117 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:20:33,119 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:20:34,929 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:20:36,072 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:20:36,074 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:20:36,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:20:36 BoogieIcfgContainer [2023-04-01 04:20:36,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:20:36,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:20:36,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:20:36,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:20:36,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:20:31" (1/3) ... [2023-04-01 04:20:36,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373187f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:20:36, skipping insertion in model container [2023-04-01 04:20:36,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:20:32" (2/3) ... [2023-04-01 04:20:36,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373187f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:20:36, skipping insertion in model container [2023-04-01 04:20:36,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:20:36" (3/3) ... [2023-04-01 04:20:36,085 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label57.c [2023-04-01 04:20:36,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:20:36,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:20:36,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:20:36,164 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;@cf3da5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:20:36,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:20:36,169 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) [2023-04-01 04:20:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:20:36,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:36,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:20:36,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:36,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:36,179 INFO L85 PathProgramCache]: Analyzing trace with hash -706734746, now seen corresponding path program 1 times [2023-04-01 04:20:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:36,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326164848] [2023-04-01 04:20:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:36,568 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 04:20:36,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:36,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326164848] [2023-04-01 04:20:36,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326164848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:36,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:20:36,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:20:36,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344496341] [2023-04-01 04:20:36,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:36,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:20:36,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:20:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:20:36,609 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) [2023-04-01 04:20:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:38,069 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:20:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:20:38,074 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 04:20:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:38,091 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:20:38,091 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:20:38,097 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 04:20:38,100 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:20:38,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 90 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:20:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:20:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 468. [2023-04-01 04:20:38,169 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) [2023-04-01 04:20:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 853 transitions. [2023-04-01 04:20:38,179 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 853 transitions. Word has length 11 [2023-04-01 04:20:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:38,181 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 853 transitions. [2023-04-01 04:20:38,181 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 04:20:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 853 transitions. [2023-04-01 04:20:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:20:38,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:38,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:20:38,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:20:38,183 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:38,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash -792044864, now seen corresponding path program 1 times [2023-04-01 04:20:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:38,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075312252] [2023-04-01 04:20:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:38,312 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 04:20:38,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:38,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075312252] [2023-04-01 04:20:38,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075312252] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:38,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:20:38,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:20:38,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573371508] [2023-04-01 04:20:38,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:38,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:20:38,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:38,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:20:38,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:38,316 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) [2023-04-01 04:20:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:39,743 INFO L93 Difference]: Finished difference Result 1410 states and 2605 transitions. [2023-04-01 04:20:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:20:39,744 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 [2023-04-01 04:20:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:39,752 INFO L225 Difference]: With dead ends: 1410 [2023-04-01 04:20:39,752 INFO L226 Difference]: Without dead ends: 947 [2023-04-01 04:20:39,754 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 04:20:39,755 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, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:20:39,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:20:39,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-04-01 04:20:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 924. [2023-04-01 04:20:39,807 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) [2023-04-01 04:20:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1604 transitions. [2023-04-01 04:20:39,810 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1604 transitions. Word has length 22 [2023-04-01 04:20:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:39,811 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1604 transitions. [2023-04-01 04:20:39,811 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) [2023-04-01 04:20:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1604 transitions. [2023-04-01 04:20:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:20:39,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:39,812 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 04:20:39,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:20:39,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:39,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:39,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1844674797, now seen corresponding path program 1 times [2023-04-01 04:20:39,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:39,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329420094] [2023-04-01 04:20:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:39,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:39,905 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 04:20:39,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:39,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329420094] [2023-04-01 04:20:39,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329420094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:39,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:20:39,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:20:39,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786778987] [2023-04-01 04:20:39,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:39,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:20:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:39,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:20:39,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:39,908 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) [2023-04-01 04:20:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:41,249 INFO L93 Difference]: Finished difference Result 2556 states and 4514 transitions. [2023-04-01 04:20:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:20:41,250 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 04:20:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:41,257 INFO L225 Difference]: With dead ends: 2556 [2023-04-01 04:20:41,257 INFO L226 Difference]: Without dead ends: 1637 [2023-04-01 04:20:41,259 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 04:20:41,260 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 994 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 [2023-04-01 04:20:41,260 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] [2023-04-01 04:20:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-04-01 04:20:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1605. [2023-04-01 04:20:41,309 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) [2023-04-01 04:20:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2404 transitions. [2023-04-01 04:20:41,316 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2404 transitions. Word has length 23 [2023-04-01 04:20:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:41,316 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 2404 transitions. [2023-04-01 04:20:41,316 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 04:20:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2404 transitions. [2023-04-01 04:20:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 04:20:41,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:41,321 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] [2023-04-01 04:20:41,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:20:41,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:41,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1787301063, now seen corresponding path program 1 times [2023-04-01 04:20:41,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:41,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023038108] [2023-04-01 04:20:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:41,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:20:41,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023038108] [2023-04-01 04:20:41,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023038108] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:20:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793022206] [2023-04-01 04:20:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:41,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:20:41,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:20:41,678 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 04:20:41,680 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 04:20:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:41,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:20:41,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:20:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:20:41,864 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:20:41,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793022206] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:41,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:20:41,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 04:20:41,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041380755] [2023-04-01 04:20:41,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:41,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:20:41,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:41,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:20:41,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:41,866 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) [2023-04-01 04:20:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:42,736 INFO L93 Difference]: Finished difference Result 3436 states and 5156 transitions. [2023-04-01 04:20:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:20:42,738 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 [2023-04-01 04:20:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:42,747 INFO L225 Difference]: With dead ends: 3436 [2023-04-01 04:20:42,748 INFO L226 Difference]: Without dead ends: 1836 [2023-04-01 04:20:42,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:42,752 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 237 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:20:42,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 423 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 04:20:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2023-04-01 04:20:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1830. [2023-04-01 04:20:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1796 states have (on average 1.4387527839643652) internal successors, (2584), 1806 states have internal predecessors, (2584), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (81), 11 states have call predecessors, (81), 11 states have call successors, (81) [2023-04-01 04:20:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2677 transitions. [2023-04-01 04:20:42,829 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2677 transitions. Word has length 92 [2023-04-01 04:20:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:42,829 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 2677 transitions. [2023-04-01 04:20:42,829 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) [2023-04-01 04:20:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2677 transitions. [2023-04-01 04:20:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-04-01 04:20:42,832 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:42,832 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] [2023-04-01 04:20:42,843 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 04:20:43,039 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 04:20:43,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:43,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1549674189, now seen corresponding path program 1 times [2023-04-01 04:20:43,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:43,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292164528] [2023-04-01 04:20:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:43,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:43,362 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 04:20:43,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292164528] [2023-04-01 04:20:43,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292164528] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:20:43,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:20:43,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:20:43,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546833192] [2023-04-01 04:20:43,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:20:43,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:20:43,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:20:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:20:43,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:20:43,373 INFO L87 Difference]: Start difference. First operand 1830 states and 2677 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) [2023-04-01 04:20:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:20:44,822 INFO L93 Difference]: Finished difference Result 4851 states and 7168 transitions. [2023-04-01 04:20:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:20:44,822 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 [2023-04-01 04:20:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:20:44,840 INFO L225 Difference]: With dead ends: 4851 [2023-04-01 04:20:44,840 INFO L226 Difference]: Without dead ends: 3026 [2023-04-01 04:20:44,874 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 04:20:44,875 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 570 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:20:44,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 43 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:20:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2023-04-01 04:20:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2976. [2023-04-01 04:20:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2911 states have (on average 1.389556853315012) internal successors, (4045), 2942 states have internal predecessors, (4045), 17 states have call successors, (17), 17 states have call predecessors, (17), 47 states have return successors, (229), 16 states have call predecessors, (229), 16 states have call successors, (229) [2023-04-01 04:20:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4291 transitions. [2023-04-01 04:20:44,975 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4291 transitions. Word has length 135 [2023-04-01 04:20:44,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:20:44,977 INFO L495 AbstractCegarLoop]: Abstraction has 2976 states and 4291 transitions. [2023-04-01 04:20:44,977 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) [2023-04-01 04:20:44,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4291 transitions. [2023-04-01 04:20:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-04-01 04:20:44,987 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:20:44,987 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 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 04:20:44,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:20:44,987 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:20:44,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:20:44,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1625057244, now seen corresponding path program 1 times [2023-04-01 04:20:44,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:20:44,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063491783] [2023-04-01 04:20:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:44,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:20:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:20:45,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:20:45,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063491783] [2023-04-01 04:20:45,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063491783] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:20:45,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333383925] [2023-04-01 04:20:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:20:45,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:20:45,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:20:45,281 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 04:20:45,307 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 04:20:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:20:45,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:20:45,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:20:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:20:45,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:20:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 04:20:45,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333383925] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:20:45,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390551678] [2023-04-01 04:20:45,812 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 04:20:45,813 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:20:45,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:20:45,820 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:20:45,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:20:45,960 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 04:20:46,194 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2023-04-01 04:20:52,094 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 108938 conjuctions. This might take some time... [2023-04-01 04:21:04,210 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1134 conjuctions. [2023-04-01 04:21:19,811 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 27