/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/Problem18_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:28:58,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:28:58,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:28:58,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:28:58,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:28:58,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:28:58,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:28:58,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:28:58,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:28:58,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:28:58,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:28:58,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:28:58,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:28:58,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:28:58,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:28:58,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:28:58,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:28:58,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:28:58,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:28:58,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:28:58,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:28:58,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:28:58,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:28:58,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:28:58,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:28:58,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:28:58,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:28:58,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:28:58,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:28:58,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:28:58,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:28:58,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:28:58,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:28:58,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:28:58,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:28:58,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:28:58,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:28:58,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:28:58,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:28:58,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:28:58,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:28:58,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:28:58,987 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:28:58,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:28:58,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:28:58,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:28:58,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:28:58,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:28:58,988 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:28:58,988 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:28:58,988 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:28:58,988 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:28:58,992 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:28:58,992 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:28:58,992 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:28:58,992 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:28:58,992 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:28:58,992 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:28:58,992 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:28:58,992 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:28:58,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:28:58,993 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:28:58,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:28:58,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:28:58,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:28:58,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:28:58,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:28:58,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:28:58,994 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:28:58,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:28:58,994 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:28:58,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:28:58,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:28:58,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:28:58,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:28:58,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:28:58,994 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:28:58,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:28:58,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:28:58,995 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:28:58,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:28:58,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:28:58,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:28:58,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:28:59,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:28:59,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:28:59,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:28:59,167 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:28:59,167 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:28:59,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label06.c [2023-04-01 10:29:00,045 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:29:00,385 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:29:00,385 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label06.c [2023-04-01 10:29:00,398 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a54a7cce9/087f843739cf412686d275aed0360351/FLAG28dd7d888 [2023-04-01 10:29:00,648 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a54a7cce9/087f843739cf412686d275aed0360351 [2023-04-01 10:29:00,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:29:00,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:29:00,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:29:00,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:29:00,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:29:00,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:29:00" (1/1) ... [2023-04-01 10:29:00,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b9c74cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:00, skipping insertion in model container [2023-04-01 10:29:00,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:29:00" (1/1) ... [2023-04-01 10:29:00,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:29:00,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:29:00,915 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_label06.c[2911,2924] [2023-04-01 10:29:01,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:29:01,326 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:29:01,344 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_label06.c[2911,2924] [2023-04-01 10:29:01,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:29:01,533 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:29:01,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01 WrapperNode [2023-04-01 10:29:01,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:29:01,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:29:01,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:29:01,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:29:01,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (1/1) ... [2023-04-01 10:29:01,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (1/1) ... [2023-04-01 10:29:01,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (1/1) ... [2023-04-01 10:29:01,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (1/1) ... [2023-04-01 10:29:01,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (1/1) ... [2023-04-01 10:29:01,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (1/1) ... [2023-04-01 10:29:01,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (1/1) ... [2023-04-01 10:29:01,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (1/1) ... [2023-04-01 10:29:01,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:29:01,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:29:01,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:29:01,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:29:01,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (1/1) ... [2023-04-01 10:29:01,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:29:01,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:29:01,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:29:01,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:29:01,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:29:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:29:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:29:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:29:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:29:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:29:01,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:29:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:29:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:29:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:29:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:29:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:29:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:29:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:29:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:29:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:29:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:29:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:29:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:29:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:29:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:29:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:29:01,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:29:01,990 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:29:02,005 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:29:04,045 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:29:10,229 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:29:10,230 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:29:10,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:10 BoogieIcfgContainer [2023-04-01 10:29:10,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:29:10,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:29:10,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:29:10,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:29:10,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:29:00" (1/3) ... [2023-04-01 10:29:10,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d777a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:10, skipping insertion in model container [2023-04-01 10:29:10,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:29:01" (2/3) ... [2023-04-01 10:29:10,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d777a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:29:10, skipping insertion in model container [2023-04-01 10:29:10,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:29:10" (3/3) ... [2023-04-01 10:29:10,238 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label06.c [2023-04-01 10:29:10,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:29:10,251 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:29:10,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:29:10,292 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;@63569699, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:29:10,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:29:10,297 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) [2023-04-01 10:29:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:29:10,302 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:29:10,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:29:10,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:29:10,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:29:10,306 INFO L85 PathProgramCache]: Analyzing trace with hash 314227971, now seen corresponding path program 1 times [2023-04-01 10:29:10,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:29:10,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660518010] [2023-04-01 10:29:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:10,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:29:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:10,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:29:10,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660518010] [2023-04-01 10:29:10,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660518010] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:29:10,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:29:10,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:29:10,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135625102] [2023-04-01 10:29:10,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:29:10,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:29:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:29:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:29:10,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:29:10,642 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) [2023-04-01 10:29:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:29:12,194 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 10:29:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:29:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:29:12,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:29:12,213 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 10:29:12,214 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 10:29:12,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:29:12,229 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 472 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:29:12,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 366 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:29:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 10:29:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 10:29:12,322 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) [2023-04-01 10:29:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions. [2023-04-01 10:29:12,335 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11 [2023-04-01 10:29:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:29:12,335 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions. [2023-04-01 10:29:12,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:29:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions. [2023-04-01 10:29:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 10:29:12,336 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:29:12,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:29:12,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:29:12,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:29:12,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:29:12,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2078101838, now seen corresponding path program 1 times [2023-04-01 10:29:12,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:29:12,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565636407] [2023-04-01 10:29:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:29:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:12,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:29:12,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565636407] [2023-04-01 10:29:12,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565636407] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:29:12,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:29:12,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:29:12,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386113469] [2023-04-01 10:29:12,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:29:12,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:29:12,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:29:12,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:29:12,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:29:12,575 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) [2023-04-01 10:29:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:29:14,989 INFO L93 Difference]: Finished difference Result 2795 states and 4544 transitions. [2023-04-01 10:29:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:29:14,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 10:29:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:29:14,996 INFO L225 Difference]: With dead ends: 2795 [2023-04-01 10:29:14,996 INFO L226 Difference]: Without dead ends: 1881 [2023-04-01 10:29:14,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:29:14,998 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1520 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3161 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:29:14,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 94 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3161 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 10:29:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2023-04-01 10:29:15,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1843. [2023-04-01 10:29:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1809 states have (on average 1.4145936981757876) internal successors, (2559), 1816 states have internal predecessors, (2559), 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) [2023-04-01 10:29:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2624 transitions. [2023-04-01 10:29:15,042 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2624 transitions. Word has length 22 [2023-04-01 10:29:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:29:15,042 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2624 transitions. [2023-04-01 10:29:15,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:29:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2624 transitions. [2023-04-01 10:29:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 10:29:15,043 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:29:15,043 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:29:15,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:29:15,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:29:15,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:29:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1679922728, now seen corresponding path program 1 times [2023-04-01 10:29:15,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:29:15,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166307293] [2023-04-01 10:29:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:15,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:29:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:29:15,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:29:15,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166307293] [2023-04-01 10:29:15,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166307293] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:29:15,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451384237] [2023-04-01 10:29:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:15,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:29:15,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:29:15,181 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:29:15,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:29:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:15,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:29:15,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:29:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:29:15,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:29:15,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451384237] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:29:15,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:29:15,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:29:15,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328368999] [2023-04-01 10:29:15,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:29:15,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:29:15,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:29:15,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:29:15,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:29:15,339 INFO L87 Difference]: Start difference. First operand 1843 states and 2624 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) [2023-04-01 10:29:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:29:17,681 INFO L93 Difference]: Finished difference Result 5615 states and 8140 transitions. [2023-04-01 10:29:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:29:17,681 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 [2023-04-01 10:29:17,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:29:17,692 INFO L225 Difference]: With dead ends: 5615 [2023-04-01 10:29:17,692 INFO L226 Difference]: Without dead ends: 3777 [2023-04-01 10:29:17,694 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 [2023-04-01 10:29:17,695 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1572 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:29:17,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 59 Invalid, 3460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 10:29:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2023-04-01 10:29:17,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658. [2023-04-01 10:29:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3573 states have (on average 1.2549678141617688) internal successors, (4484), 3601 states have internal predecessors, (4484), 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) [2023-04-01 10:29:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4698 transitions. [2023-04-01 10:29:17,750 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4698 transitions. Word has length 32 [2023-04-01 10:29:17,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:29:17,750 INFO L495 AbstractCegarLoop]: Abstraction has 3658 states and 4698 transitions. [2023-04-01 10:29:17,750 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) [2023-04-01 10:29:17,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4698 transitions. [2023-04-01 10:29:17,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 10:29:17,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:29:17,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 10:29:17,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:29:17,957 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 [2023-04-01 10:29:17,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:29:17,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:29:17,960 INFO L85 PathProgramCache]: Analyzing trace with hash -436778156, now seen corresponding path program 1 times [2023-04-01 10:29:17,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:29:17,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971542420] [2023-04-01 10:29:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:17,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:29:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:18,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:29:18,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971542420] [2023-04-01 10:29:18,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971542420] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:29:18,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440727353] [2023-04-01 10:29:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:29:18,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:29:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:29:18,126 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:29:18,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:29:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:29:18,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:29:18,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:29:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:18,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:29:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:29:18,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440727353] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:29:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385810409] [2023-04-01 10:29:18,387 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-01 10:29:18,387 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:29:18,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:29:18,394 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:29:18,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:29:18,593 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 10:29:18,735 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2023-04-01 10:29:22,691 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 42