/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/Problem18_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:27:51,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:27:51,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:27:51,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:27:51,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:27:51,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:27:51,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:27:51,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:27:51,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:27:51,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:27:51,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:27:51,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:27:51,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:27:51,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:27:51,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:27:51,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:27:51,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:27:51,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:27:51,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:27:51,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:27:51,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:27:51,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:27:51,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:27:51,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:27:51,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:27:51,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:27:51,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:27:51,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:27:51,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:27:51,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:27:51,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:27:51,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:27:51,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:27:51,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:27:51,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:27:51,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:27:51,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:27:51,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:27:51,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:27:51,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:27:51,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:27:51,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 20:27:51,199 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:27:51,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:27:51,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:27:51,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:27:51,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:27:51,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:27:51,201 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:27:51,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:27:51,202 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:27:51,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:27:51,203 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:27:51,203 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:27:51,203 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:27:51,203 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:27:51,203 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:27:51,203 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:27:51,204 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:27:51,204 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:27:51,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:27:51,204 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:27:51,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:27:51,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:27:51,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:27:51,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:27:51,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:27:51,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:27:51,205 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:27:51,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:27:51,205 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:27:51,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:27:51,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:27:51,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:27:51,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:27:51,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:27:51,206 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:27:51,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:27:51,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:27:51,207 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:27:51,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:27:51,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:27:51,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:27:51,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:27:51,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:27:51,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:27:51,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:27:51,447 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:27:51,448 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:27:51,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label20.c [2023-04-02 20:27:52,619 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:27:52,973 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:27:52,973 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label20.c [2023-04-02 20:27:53,001 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/544404d2a/035a77addea04b0c90566f3605705505/FLAG0eda0c81e [2023-04-02 20:27:53,015 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/544404d2a/035a77addea04b0c90566f3605705505 [2023-04-02 20:27:53,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:27:53,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:27:53,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:27:53,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:27:53,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:27:53,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:27:53" (1/1) ... [2023-04-02 20:27:53,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e1857b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:53, skipping insertion in model container [2023-04-02 20:27:53,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:27:53" (1/1) ... [2023-04-02 20:27:53,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:27:53,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:27:53,288 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/Problem18_label20.c[1084,1097] [2023-04-02 20:27:53,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:27:53,876 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:27:53,888 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/Problem18_label20.c[1084,1097] [2023-04-02 20:27:54,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:27:54,177 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:27:54,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54 WrapperNode [2023-04-02 20:27:54,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:27:54,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:27:54,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:27:54,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:27:54,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (1/1) ... [2023-04-02 20:27:54,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (1/1) ... [2023-04-02 20:27:54,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (1/1) ... [2023-04-02 20:27:54,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (1/1) ... [2023-04-02 20:27:54,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (1/1) ... [2023-04-02 20:27:54,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (1/1) ... [2023-04-02 20:27:54,377 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (1/1) ... [2023-04-02 20:27:54,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (1/1) ... [2023-04-02 20:27:54,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:27:54,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:27:54,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:27:54,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:27:54,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (1/1) ... [2023-04-02 20:27:54,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:27:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:27:54,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 20:27:54,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 20:27:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:27:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:27:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:27:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:27:54,480 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:27:54,480 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 20:27:54,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:27:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:27:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:27:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 20:27:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:27:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:27:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:27:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:27:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:27:54,480 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:27:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:27:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:27:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:27:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:27:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:27:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:27:54,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:27:54,584 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:27:54,586 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:27:57,268 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:28:04,238 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:28:04,238 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:28:04,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:28:04 BoogieIcfgContainer [2023-04-02 20:28:04,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:28:04,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:28:04,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:28:04,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:28:04,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:27:53" (1/3) ... [2023-04-02 20:28:04,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276290d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:28:04, skipping insertion in model container [2023-04-02 20:28:04,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:27:54" (2/3) ... [2023-04-02 20:28:04,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276290d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:28:04, skipping insertion in model container [2023-04-02 20:28:04,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:28:04" (3/3) ... [2023-04-02 20:28:04,248 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label20.c [2023-04-02 20:28:04,263 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:28:04,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:28:04,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:28:04,318 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;@4afad1f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:28:04,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:28:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 20:28:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:28:04,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:28:04,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:28:04,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:28:04,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:28:04,335 INFO L85 PathProgramCache]: Analyzing trace with hash 312454867, now seen corresponding path program 1 times [2023-04-02 20:28:04,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:28:04,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986158603] [2023-04-02 20:28:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:28:04,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:28:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:28:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:28:04,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:28:04,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986158603] [2023-04-02 20:28:04,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986158603] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:28:04,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:28:04,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:28:04,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219927114] [2023-04-02 20:28:04,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:28:04,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:28:04,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:28:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:28:04,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:28:04,609 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:28:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:28:06,777 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-02 20:28:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:28:06,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 20:28:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:28:06,803 INFO L225 Difference]: With dead ends: 1393 [2023-04-02 20:28:06,803 INFO L226 Difference]: Without dead ends: 921 [2023-04-02 20:28:06,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:28:06,822 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 472 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-02 20:28:06,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 368 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-02 20:28:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-02 20:28:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-02 20:28:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-02 20:28:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions. [2023-04-02 20:28:06,919 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11 [2023-04-02 20:28:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:28:06,919 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions. [2023-04-02 20:28:06,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:28:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions. [2023-04-02 20:28:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 20:28:06,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:28:06,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:28:06,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:28:06,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:28:06,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:28:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1943879606, now seen corresponding path program 1 times [2023-04-02 20:28:06,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:28:06,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790921868] [2023-04-02 20:28:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:28:06,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:28:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:28:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:28:07,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:28:07,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790921868] [2023-04-02 20:28:07,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790921868] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:28:07,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:28:07,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:28:07,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033818236] [2023-04-02 20:28:07,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:28:07,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:28:07,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:28:07,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:28:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:28:07,138 INFO L87 Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 20:28:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:28:10,438 INFO L93 Difference]: Finished difference Result 2797 states and 4545 transitions. [2023-04-02 20:28:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 20:28:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-02 20:28:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:28:10,448 INFO L225 Difference]: With dead ends: 2797 [2023-04-02 20:28:10,449 INFO L226 Difference]: Without dead ends: 1883 [2023-04-02 20:28:10,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-02 20:28:10,452 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1522 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3160 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 3160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 20:28:10,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 99 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 3160 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 20:28:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2023-04-02 20:28:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1843. [2023-04-02 20:28:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1809 states have (on average 1.4151464897733554) internal successors, (2560), 1816 states have internal predecessors, (2560), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54) [2023-04-02 20:28:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2625 transitions. [2023-04-02 20:28:10,510 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2625 transitions. Word has length 22 [2023-04-02 20:28:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:28:10,510 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2625 transitions. [2023-04-02 20:28:10,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 20:28:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2625 transitions. [2023-04-02 20:28:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 20:28:10,512 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:28:10,512 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:28:10,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:28:10,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:28:10,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:28:10,513 INFO L85 PathProgramCache]: Analyzing trace with hash 993556184, now seen corresponding path program 1 times [2023-04-02 20:28:10,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:28:10,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820767639] [2023-04-02 20:28:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:28:10,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:28:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:28:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 20:28:10,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:28:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820767639] [2023-04-02 20:28:10,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820767639] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:28:10,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385000499] [2023-04-02 20:28:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:28:10,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:28:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:28:10,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 20:28:10,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 20:28:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:28:10,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 20:28:10,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:28:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:28:10,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 20:28:10,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385000499] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:28:10,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 20:28:10,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-02 20:28:10,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114141917] [2023-04-02 20:28:10,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:28:10,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:28:10,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:28:10,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:28:10,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 20:28:10,888 INFO L87 Difference]: Start difference. First operand 1843 states and 2625 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-04-02 20:28:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:28:13,597 INFO L93 Difference]: Finished difference Result 5615 states and 8143 transitions. [2023-04-02 20:28:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:28:13,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 32 [2023-04-02 20:28:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:28:13,618 INFO L225 Difference]: With dead ends: 5615 [2023-04-02 20:28:13,618 INFO L226 Difference]: Without dead ends: 3777 [2023-04-02 20:28:13,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-02 20:28:13,627 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1574 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 3455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 20:28:13,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1574 Valid, 62 Invalid, 3455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 20:28:13,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2023-04-02 20:28:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658. [2023-04-02 20:28:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3573 states have (on average 1.2555275678701372) internal successors, (4486), 3601 states have internal predecessors, (4486), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195) [2023-04-02 20:28:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4700 transitions. [2023-04-02 20:28:13,743 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4700 transitions. Word has length 32 [2023-04-02 20:28:13,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:28:13,743 INFO L495 AbstractCegarLoop]: Abstraction has 3658 states and 4700 transitions. [2023-04-02 20:28:13,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2023-04-02 20:28:13,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4700 transitions. [2023-04-02 20:28:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 20:28:13,745 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:28:13,746 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] [2023-04-02 20:28:13,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 20:28:13,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:28:13,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:28:13,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:28:13,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1788884871, now seen corresponding path program 1 times [2023-04-02 20:28:13,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:28:13,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490531040] [2023-04-02 20:28:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:28:13,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:28:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:28:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:28:14,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:28:14,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490531040] [2023-04-02 20:28:14,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490531040] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:28:14,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:28:14,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:28:14,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955550232] [2023-04-02 20:28:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:28:14,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:28:14,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:28:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:28:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:28:14,095 INFO L87 Difference]: Start difference. First operand 3658 states and 4700 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 20:28:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:28:15,690 INFO L93 Difference]: Finished difference Result 9168 states and 12163 transitions. [2023-04-02 20:28:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:28:15,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-04-02 20:28:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:28:15,717 INFO L225 Difference]: With dead ends: 9168 [2023-04-02 20:28:15,717 INFO L226 Difference]: Without dead ends: 5515 [2023-04-02 20:28:15,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:28:15,728 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 492 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 20:28:15,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 842 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 20:28:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2023-04-02 20:28:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 4958. [2023-04-02 20:28:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4958 states, 4846 states have (on average 1.2150226991333057) internal successors, (5888), 4883 states have internal predecessors, (5888), 25 states have call successors, (25), 25 states have call predecessors, (25), 86 states have return successors, (309), 49 states have call predecessors, (309), 24 states have call successors, (309) [2023-04-02 20:28:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4958 states to 4958 states and 6222 transitions. [2023-04-02 20:28:15,861 INFO L78 Accepts]: Start accepts. Automaton has 4958 states and 6222 transitions. Word has length 49 [2023-04-02 20:28:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:28:15,863 INFO L495 AbstractCegarLoop]: Abstraction has 4958 states and 6222 transitions. [2023-04-02 20:28:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 20:28:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 4958 states and 6222 transitions. [2023-04-02 20:28:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 20:28:15,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:28:15,873 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2023-04-02 20:28:15,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 20:28:15,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:28:15,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:28:15,874 INFO L85 PathProgramCache]: Analyzing trace with hash 18971913, now seen corresponding path program 1 times [2023-04-02 20:28:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:28:15,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935349231] [2023-04-02 20:28:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:28:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:28:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:28:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 65 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 20:28:16,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:28:16,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935349231] [2023-04-02 20:28:16,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935349231] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:28:16,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406609449] [2023-04-02 20:28:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:28:16,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:28:16,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:28:16,273 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) [2023-04-02 20:28:16,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 20:28:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:28:16,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:28:16,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:28:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 20:28:16,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:28:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 65 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-02 20:28:16,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406609449] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:28:16,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891202700] [2023-04-02 20:28:16,793 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-02 20:28:16,793 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:28:16,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:28:16,802 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:28:16,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:28:16,972 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-02 20:28:17,241 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 61 [2023-04-02 20:28:43,454 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 185542 conjuctions. This might take some time... [2023-04-02 20:28:56,190 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 78 conjuctions. [2023-04-02 20:29:09,785 WARN L223 SmtUtils]: Spent 10.63s on a formula simplification that was a NOOP. DAG size: 924 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 20:30:04,136 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10536 conjuctions. This might take some time... [2023-04-02 20:30:09,978 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 10536 conjuctions.