/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:17:50,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:17:50,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:17:50,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:17:50,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:17:50,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:17:50,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:17:50,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:17:50,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:17:50,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:17:50,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:17:50,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:17:50,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:17:50,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:17:50,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:17:50,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:17:50,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:17:50,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:17:50,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:17:50,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:17:50,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:17:50,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:17:50,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:17:50,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:17:50,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:17:50,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:17:50,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:17:50,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:17:50,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:17:50,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:17:50,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:17:50,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:17:50,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:17:50,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:17:50,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:17:50,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:17:50,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:17:50,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:17:50,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:17:50,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:17:50,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:17:50,154 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 09:17:50,168 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:17:50,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:17:50,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:17:50,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:17:50,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:17:50,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:17:50,170 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:17:50,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:17:50,170 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:17:50,170 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:17:50,171 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:17:50,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:17:50,171 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:17:50,171 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:17:50,171 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:17:50,171 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:17:50,171 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:17:50,171 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:17:50,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:17:50,172 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:17:50,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:17:50,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:17:50,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:17:50,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:17:50,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:17:50,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:17:50,173 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:17:50,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:17:50,173 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:17:50,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:17:50,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:17:50,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:17:50,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:17:50,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:17:50,173 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:17:50,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:17:50,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:17:50,174 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:17:50,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:17:50,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:17:50,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:17:50,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:17:50,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:17:50,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:17:50,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:17:50,364 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:17:50,365 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:17:50,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label04.c [2023-04-01 09:17:51,332 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:17:51,557 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:17:51,558 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label04.c [2023-04-01 09:17:51,565 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf3f71ca4/1d4b2a98884e4f5da2e5e6d8d4a0602a/FLAGbdfd253b2 [2023-04-01 09:17:51,577 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf3f71ca4/1d4b2a98884e4f5da2e5e6d8d4a0602a [2023-04-01 09:17:51,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:17:51,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:17:51,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:17:51,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:17:51,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:17:51,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@339ea5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51, skipping insertion in model container [2023-04-01 09:17:51,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:17:51,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:17:51,797 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/Problem02_label04.c[17470,17483] [2023-04-01 09:17:51,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:17:51,827 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:17:51,889 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/Problem02_label04.c[17470,17483] [2023-04-01 09:17:51,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:17:51,908 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:17:51,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51 WrapperNode [2023-04-01 09:17:51,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:17:51,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:17:51,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:17:51,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:17:51,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,971 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:17:51,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:17:51,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:17:51,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:17:51,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (1/1) ... [2023-04-01 09:17:51,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:17:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:52,017 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 09:17:52,026 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 09:17:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:17:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:17:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:17:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:17:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:17:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:17:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:17:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:17:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:17:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:17:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:17:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:17:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:17:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:17:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:17:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:17:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:17:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:17:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:17:52,119 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:17:52,120 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:17:52,820 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:17:52,972 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:17:52,973 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:17:52,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:17:52 BoogieIcfgContainer [2023-04-01 09:17:52,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:17:52,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:17:52,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:17:52,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:17:52,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:17:51" (1/3) ... [2023-04-01 09:17:52,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd11755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:17:52, skipping insertion in model container [2023-04-01 09:17:52,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:17:51" (2/3) ... [2023-04-01 09:17:52,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd11755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:17:52, skipping insertion in model container [2023-04-01 09:17:52,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:17:52" (3/3) ... [2023-04-01 09:17:52,986 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label04.c [2023-04-01 09:17:53,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:17:53,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:17:53,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:17:53,055 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;@267c358f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:17:53,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:17:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:17:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:17:53,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:53,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:17:53,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:53,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2027410472, now seen corresponding path program 1 times [2023-04-01 09:17:53,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:53,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416008898] [2023-04-01 09:17:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:53,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:53,577 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 09:17:53,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:53,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416008898] [2023-04-01 09:17:53,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416008898] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:53,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:53,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:17:53,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943828020] [2023-04-01 09:17:53,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:53,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:17:53,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:17:53,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:17:53,617 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:17:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:53,926 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 09:17:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:17:53,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-04-01 09:17:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:53,935 INFO L225 Difference]: With dead ends: 273 [2023-04-01 09:17:53,935 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:17:53,937 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 09:17:53,939 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:53,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 47 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:17:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 09:17:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:17:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-04-01 09:17:53,975 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-04-01 09:17:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:53,976 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-04-01 09:17:53,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 09:17:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-04-01 09:17:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 09:17:53,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:53,979 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] [2023-04-01 09:17:53,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:17:53,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:53,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash -78199900, now seen corresponding path program 1 times [2023-04-01 09:17:53,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:53,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583652099] [2023-04-01 09:17:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:53,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:54,407 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 09:17:54,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:54,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583652099] [2023-04-01 09:17:54,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583652099] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:54,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:54,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:17:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264452868] [2023-04-01 09:17:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:54,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:54,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:54,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:17:54,410 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 09:17:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:54,816 INFO L93 Difference]: Finished difference Result 535 states and 973 transitions. [2023-04-01 09:17:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:17:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 09:17:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:54,822 INFO L225 Difference]: With dead ends: 535 [2023-04-01 09:17:54,822 INFO L226 Difference]: Without dead ends: 365 [2023-04-01 09:17:54,823 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 09:17:54,824 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 268 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:54,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 46 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:17:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-04-01 09:17:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 357. [2023-04-01 09:17:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 338 states have (on average 1.6094674556213018) internal successors, (544), 345 states have internal predecessors, (544), 6 states have call successors, (6), 6 states have call predecessors, (6), 12 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 09:17:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 579 transitions. [2023-04-01 09:17:54,846 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 579 transitions. Word has length 94 [2023-04-01 09:17:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:54,847 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 579 transitions. [2023-04-01 09:17:54,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 09:17:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 579 transitions. [2023-04-01 09:17:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-01 09:17:54,850 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:54,850 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:17:54,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:17:54,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:54,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash 360486687, now seen corresponding path program 1 times [2023-04-01 09:17:54,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:54,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903894274] [2023-04-01 09:17:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:54,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:54,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903894274] [2023-04-01 09:17:54,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903894274] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:54,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:54,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:17:54,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293400381] [2023-04-01 09:17:54,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:54,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:17:54,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:17:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:17:54,977 INFO L87 Difference]: Start difference. First operand 357 states and 579 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:17:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:55,222 INFO L93 Difference]: Finished difference Result 1057 states and 1779 transitions. [2023-04-01 09:17:55,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:17:55,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2023-04-01 09:17:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:55,225 INFO L225 Difference]: With dead ends: 1057 [2023-04-01 09:17:55,225 INFO L226 Difference]: Without dead ends: 705 [2023-04-01 09:17:55,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:17:55,227 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:55,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 200 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:17:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2023-04-01 09:17:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 619. [2023-04-01 09:17:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 589 states have (on average 1.5449915110356536) internal successors, (910), 601 states have internal predecessors, (910), 9 states have call successors, (9), 9 states have call predecessors, (9), 20 states have return successors, (77), 8 states have call predecessors, (77), 8 states have call successors, (77) [2023-04-01 09:17:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 996 transitions. [2023-04-01 09:17:55,254 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 996 transitions. Word has length 120 [2023-04-01 09:17:55,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:55,254 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 996 transitions. [2023-04-01 09:17:55,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:17:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 996 transitions. [2023-04-01 09:17:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 09:17:55,257 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:55,257 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1] [2023-04-01 09:17:55,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:17:55,258 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:55,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:55,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2030622568, now seen corresponding path program 1 times [2023-04-01 09:17:55,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:55,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115175966] [2023-04-01 09:17:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:55,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:55,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:55,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115175966] [2023-04-01 09:17:55,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115175966] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:55,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:17:55,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:17:55,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891439032] [2023-04-01 09:17:55,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:55,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:55,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:17:55,426 INFO L87 Difference]: Start difference. First operand 619 states and 996 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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 09:17:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:55,774 INFO L93 Difference]: Finished difference Result 1723 states and 2953 transitions. [2023-04-01 09:17:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:17:55,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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 146 [2023-04-01 09:17:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:55,779 INFO L225 Difference]: With dead ends: 1723 [2023-04-01 09:17:55,779 INFO L226 Difference]: Without dead ends: 1109 [2023-04-01 09:17:55,780 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 09:17:55,781 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 259 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:55,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 42 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2023-04-01 09:17:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1077. [2023-04-01 09:17:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1018 states have (on average 1.3889980353634577) internal successors, (1414), 1049 states have internal predecessors, (1414), 14 states have call successors, (14), 14 states have call predecessors, (14), 44 states have return successors, (196), 13 states have call predecessors, (196), 13 states have call successors, (196) [2023-04-01 09:17:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1624 transitions. [2023-04-01 09:17:55,851 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1624 transitions. Word has length 146 [2023-04-01 09:17:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:55,851 INFO L495 AbstractCegarLoop]: Abstraction has 1077 states and 1624 transitions. [2023-04-01 09:17:55,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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 09:17:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1624 transitions. [2023-04-01 09:17:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:17:55,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:55,854 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:17:55,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:17:55,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:55,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash 646579673, now seen corresponding path program 1 times [2023-04-01 09:17:55,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:55,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017476449] [2023-04-01 09:17:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:55,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:17:56,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:56,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017476449] [2023-04-01 09:17:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017476449] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:17:56,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149231383] [2023-04-01 09:17:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:56,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:17:56,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:56,048 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 09:17:56,069 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 09:17:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:56,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:17:56,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:17:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 09:17:56,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:17:56,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149231383] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:56,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:17:56,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:17:56,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085019260] [2023-04-01 09:17:56,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:56,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:56,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:56,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:56,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:17:56,233 INFO L87 Difference]: Start difference. First operand 1077 states and 1624 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:17:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:56,644 INFO L93 Difference]: Finished difference Result 2691 states and 4153 transitions. [2023-04-01 09:17:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:17:56,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 149 [2023-04-01 09:17:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:56,650 INFO L225 Difference]: With dead ends: 2691 [2023-04-01 09:17:56,650 INFO L226 Difference]: Without dead ends: 1619 [2023-04-01 09:17:56,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:17:56,652 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 247 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:56,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 45 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2023-04-01 09:17:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1523. [2023-04-01 09:17:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1441 states have (on average 1.3129770992366412) internal successors, (1892), 1485 states have internal predecessors, (1892), 19 states have call successors, (19), 19 states have call predecessors, (19), 62 states have return successors, (293), 18 states have call predecessors, (293), 18 states have call successors, (293) [2023-04-01 09:17:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2204 transitions. [2023-04-01 09:17:56,683 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2204 transitions. Word has length 149 [2023-04-01 09:17:56,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:56,684 INFO L495 AbstractCegarLoop]: Abstraction has 1523 states and 2204 transitions. [2023-04-01 09:17:56,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:17:56,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2204 transitions. [2023-04-01 09:17:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:17:56,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:56,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 09:17:56,695 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 09:17:56,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:17:56,893 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:56,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1193883686, now seen corresponding path program 1 times [2023-04-01 09:17:56,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:56,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548556324] [2023-04-01 09:17:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:56,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:17:56,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548556324] [2023-04-01 09:17:56,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548556324] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:17:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597979027] [2023-04-01 09:17:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:56,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:17:56,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:57,000 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 09:17:57,002 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 09:17:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:57,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:17:57,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:17:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 09:17:57,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:17:57,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597979027] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:17:57,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:17:57,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:17:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644168885] [2023-04-01 09:17:57,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:17:57,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:17:57,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:17:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:17:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:17:57,214 INFO L87 Difference]: Start difference. First operand 1523 states and 2204 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 09:17:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:17:57,588 INFO L93 Difference]: Finished difference Result 3903 states and 5990 transitions. [2023-04-01 09:17:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:17:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 149 [2023-04-01 09:17:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:17:57,596 INFO L225 Difference]: With dead ends: 3903 [2023-04-01 09:17:57,596 INFO L226 Difference]: Without dead ends: 2291 [2023-04-01 09:17:57,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:17:57,602 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 303 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:17:57,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 37 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:17:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-04-01 09:17:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2245. [2023-04-01 09:17:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2122 states have (on average 1.2898209236569274) internal successors, (2737), 2191 states have internal predecessors, (2737), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (432), 26 states have call predecessors, (432), 26 states have call successors, (432) [2023-04-01 09:17:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3196 transitions. [2023-04-01 09:17:57,664 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3196 transitions. Word has length 149 [2023-04-01 09:17:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:17:57,664 INFO L495 AbstractCegarLoop]: Abstraction has 2245 states and 3196 transitions. [2023-04-01 09:17:57,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 09:17:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3196 transitions. [2023-04-01 09:17:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 09:17:57,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:17:57,669 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:17:57,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:17:57,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 09:17:57,874 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:17:57,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:17:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1446281749, now seen corresponding path program 1 times [2023-04-01 09:17:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:17:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668407712] [2023-04-01 09:17:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:57,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:17:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 86 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 09:17:58,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:17:58,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668407712] [2023-04-01 09:17:58,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668407712] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:17:58,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151779883] [2023-04-01 09:17:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:17:58,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:17:58,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:17:58,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:17:58,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:17:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:17:58,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:17:58,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:17:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 77 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-01 09:17:58,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:17:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:17:58,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151779883] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:17:58,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865887526] [2023-04-01 09:17:58,337 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 09:17:58,337 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:17:58,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:17:58,342 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:17:58,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:17:58,573 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs