/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/Problem12_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:20:32,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:20:32,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:20:32,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:20:32,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:20:32,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:20:32,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:20:32,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:20:32,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:20:32,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:20:32,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:20:32,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:20:32,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:20:32,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:20:32,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:20:32,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:20:32,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:20:32,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:20:32,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:20:32,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:20:32,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:20:32,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:20:32,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:20:32,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:20:32,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:20:32,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:20:32,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:20:32,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:20:32,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:20:32,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:20:32,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:20:32,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:20:32,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:20:32,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:20:32,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:20:32,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:20:32,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:20:32,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:20:32,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:20:32,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:20:32,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:20:32,249 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 19:20:32,272 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:20:32,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:20:32,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:20:32,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:20:32,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:20:32,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:20:32,273 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:20:32,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:20:32,274 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:20:32,274 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:20:32,274 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:20:32,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:20:32,274 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:20:32,274 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:20:32,275 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:20:32,275 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:20:32,275 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:20:32,275 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:20:32,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:20:32,275 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:20:32,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:20:32,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:20:32,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:20:32,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:20:32,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:20:32,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:20:32,276 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:20:32,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:20:32,276 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:20:32,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:20:32,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:20:32,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:20:32,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:20:32,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:20:32,277 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:20:32,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:20:32,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:20:32,277 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:20:32,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:20:32,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:20:32,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:20:32,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:20:32,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:20:32,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:20:32,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:20:32,442 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:20:32,442 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:20:32,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label26.c [2023-04-02 19:20:33,493 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:20:33,882 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:20:33,882 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label26.c [2023-04-02 19:20:33,898 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215461e47/de02a57eed154671a4cec361557428ca/FLAG48e7a02fa [2023-04-02 19:20:33,911 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215461e47/de02a57eed154671a4cec361557428ca [2023-04-02 19:20:33,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:20:33,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:20:33,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:20:33,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:20:33,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:20:33,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:20:33" (1/1) ... [2023-04-02 19:20:33,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a77824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:33, skipping insertion in model container [2023-04-02 19:20:33,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:20:33" (1/1) ... [2023-04-02 19:20:33,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:20:34,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:20:34,209 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/Problem12_label26.c[5703,5716] [2023-04-02 19:20:34,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:20:34,797 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:20:34,820 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/Problem12_label26.c[5703,5716] [2023-04-02 19:20:35,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:20:35,134 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:20:35,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35 WrapperNode [2023-04-02 19:20:35,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:20:35,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:20:35,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:20:35,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:20:35,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (1/1) ... [2023-04-02 19:20:35,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (1/1) ... [2023-04-02 19:20:35,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (1/1) ... [2023-04-02 19:20:35,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (1/1) ... [2023-04-02 19:20:35,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (1/1) ... [2023-04-02 19:20:35,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (1/1) ... [2023-04-02 19:20:35,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (1/1) ... [2023-04-02 19:20:35,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (1/1) ... [2023-04-02 19:20:35,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:20:35,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:20:35,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:20:35,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:20:35,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (1/1) ... [2023-04-02 19:20:35,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:20:35,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:20:35,408 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 19:20:35,430 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 19:20:35,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:20:35,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:20:35,442 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:20:35,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:20:35,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:20:35,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:20:35,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:20:35,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:20:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:20:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:20:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:20:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:20:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:20:35,515 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:20:35,517 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:20:38,254 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:20:38,686 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:20:38,687 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:20:38,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:20:38 BoogieIcfgContainer [2023-04-02 19:20:38,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:20:38,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:20:38,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:20:38,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:20:38,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:20:33" (1/3) ... [2023-04-02 19:20:38,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f15a0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:20:38, skipping insertion in model container [2023-04-02 19:20:38,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:20:35" (2/3) ... [2023-04-02 19:20:38,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f15a0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:20:38, skipping insertion in model container [2023-04-02 19:20:38,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:20:38" (3/3) ... [2023-04-02 19:20:38,697 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label26.c [2023-04-02 19:20:38,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:20:38,710 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:20:38,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:20:38,758 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;@7e135d76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:20:38,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:20:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 19:20:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:20:38,767 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:20:38,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:20:38,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:20:38,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:20:38,771 INFO L85 PathProgramCache]: Analyzing trace with hash 636343553, now seen corresponding path program 1 times [2023-04-02 19:20:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:20:38,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096923941] [2023-04-02 19:20:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:20:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:20:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:20:38,991 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 19:20:38,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:20:38,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096923941] [2023-04-02 19:20:38,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096923941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:20:38,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:20:38,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:20:38,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647642010] [2023-04-02 19:20:38,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:20:38,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:20:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:20:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:20:39,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:20:39,016 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 19:20:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:20:41,526 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:20:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:20:41,527 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 19:20:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:20:41,545 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:20:41,545 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:20:41,551 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 19:20:41,553 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 718 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 19:20:41,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 126 Invalid, 2931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 19:20:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:20:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1367. [2023-04-02 19:20:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1349 states have (on average 1.9310600444773907) internal successors, (2605), 1349 states have internal predecessors, (2605), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-02 19:20:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2628 transitions. [2023-04-02 19:20:41,617 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2628 transitions. Word has length 11 [2023-04-02 19:20:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:20:41,618 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 2628 transitions. [2023-04-02 19:20:41,618 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 19:20:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2628 transitions. [2023-04-02 19:20:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 19:20:41,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:20:41,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:20:41,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:20:41,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:20:41,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:20:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1562293180, now seen corresponding path program 1 times [2023-04-02 19:20:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:20:41,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360772133] [2023-04-02 19:20:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:20:41,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:20:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:20:41,731 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 19:20:41,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:20:41,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360772133] [2023-04-02 19:20:41,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360772133] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:20:41,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:20:41,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:20:41,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099014050] [2023-04-02 19:20:41,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:20:41,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:20:41,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:20:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:20:41,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:20:41,734 INFO L87 Difference]: Start difference. First operand 1367 states and 2628 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 19:20:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:20:45,011 INFO L93 Difference]: Finished difference Result 4145 states and 7983 transitions. [2023-04-02 19:20:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 19:20:45,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-02 19:20:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:20:45,023 INFO L225 Difference]: With dead ends: 4145 [2023-04-02 19:20:45,024 INFO L226 Difference]: Without dead ends: 2783 [2023-04-02 19:20:45,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 19:20:45,033 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2704 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 19:20:45,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 89 Invalid, 4681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4011 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 19:20:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2023-04-02 19:20:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2754. [2023-04-02 19:20:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2712 states have (on average 1.6950589970501475) internal successors, (4597), 2716 states have internal predecessors, (4597), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-02 19:20:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 4674 transitions. [2023-04-02 19:20:45,108 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 4674 transitions. Word has length 21 [2023-04-02 19:20:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:20:45,108 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 4674 transitions. [2023-04-02 19:20:45,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 19:20:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 4674 transitions. [2023-04-02 19:20:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 19:20:45,109 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:20:45,109 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] [2023-04-02 19:20:45,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:20:45,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:20:45,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:20:45,110 INFO L85 PathProgramCache]: Analyzing trace with hash -829035240, now seen corresponding path program 1 times [2023-04-02 19:20:45,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:20:45,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164677725] [2023-04-02 19:20:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:20:45,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:20:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:20:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:20:45,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:20:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164677725] [2023-04-02 19:20:45,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164677725] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:20:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647399626] [2023-04-02 19:20:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:20:45,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:20:45,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:20:45,314 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 19:20:45,321 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 19:20:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:20:45,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 19:20:45,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:20:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 19:20:45,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:20:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 19:20:45,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647399626] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 19:20:45,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 19:20:45,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2023-04-02 19:20:45,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159049892] [2023-04-02 19:20:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:20:45,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 19:20:45,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:20:45,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 19:20:45,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 19:20:45,558 INFO L87 Difference]: Start difference. First operand 2754 states and 4674 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:20:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:20:48,308 INFO L93 Difference]: Finished difference Result 8312 states and 14286 transitions. [2023-04-02 19:20:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 19:20:48,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-04-02 19:20:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:20:48,346 INFO L225 Difference]: With dead ends: 8312 [2023-04-02 19:20:48,347 INFO L226 Difference]: Without dead ends: 5563 [2023-04-02 19:20:48,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 19:20:48,366 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2196 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 1175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 3638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1175 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:20:48,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2196 Valid, 50 Invalid, 3638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1175 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 19:20:48,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2023-04-02 19:20:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5402. [2023-04-02 19:20:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5402 states, 5300 states have (on average 1.4671698113207547) internal successors, (7776), 5316 states have internal predecessors, (7776), 27 states have call successors, (27), 27 states have call predecessors, (27), 74 states have return successors, (298), 58 states have call predecessors, (298), 26 states have call successors, (298) [2023-04-02 19:20:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 8101 transitions. [2023-04-02 19:20:48,482 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 8101 transitions. Word has length 27 [2023-04-02 19:20:48,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:20:48,483 INFO L495 AbstractCegarLoop]: Abstraction has 5402 states and 8101 transitions. [2023-04-02 19:20:48,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:20:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 8101 transitions. [2023-04-02 19:20:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 19:20:48,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:20:48,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:20:48,508 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 19:20:48,696 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 19:20:48,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:20:48,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:20:48,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1444938249, now seen corresponding path program 1 times [2023-04-02 19:20:48,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:20:48,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253911526] [2023-04-02 19:20:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:20:48,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:20:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:20:48,889 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 19:20:48,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:20:48,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253911526] [2023-04-02 19:20:48,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253911526] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:20:48,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:20:48,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:20:48,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412739335] [2023-04-02 19:20:48,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:20:48,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:20:48,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:20:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:20:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:20:48,891 INFO L87 Difference]: Start difference. First operand 5402 states and 8101 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 19:20:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:20:51,697 INFO L93 Difference]: Finished difference Result 16668 states and 26548 transitions. [2023-04-02 19:20:51,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:20:51,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 72 [2023-04-02 19:20:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:20:51,758 INFO L225 Difference]: With dead ends: 16668 [2023-04-02 19:20:51,758 INFO L226 Difference]: Without dead ends: 11271 [2023-04-02 19:20:51,770 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 19:20:51,770 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2478 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3795 mSolverCounterSat, 1089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2478 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 3795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 19:20:51,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2478 Valid, 101 Invalid, 4884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 3795 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 19:20:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11271 states. [2023-04-02 19:20:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11271 to 11096. [2023-04-02 19:20:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 10779 states have (on average 1.4043974394656276) internal successors, (15138), 10858 states have internal predecessors, (15138), 51 states have call successors, (51), 51 states have call predecessors, (51), 265 states have return successors, (1566), 186 states have call predecessors, (1566), 50 states have call successors, (1566) [2023-04-02 19:20:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 16755 transitions. [2023-04-02 19:20:51,989 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 16755 transitions. Word has length 72 [2023-04-02 19:20:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:20:51,989 INFO L495 AbstractCegarLoop]: Abstraction has 11096 states and 16755 transitions. [2023-04-02 19:20:51,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 19:20:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 16755 transitions. [2023-04-02 19:20:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 19:20:51,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:20:51,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:20:51,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 19:20:51,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:20:51,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:20:51,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1540168278, now seen corresponding path program 1 times [2023-04-02 19:20:51,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:20:51,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910991024] [2023-04-02 19:20:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:20:51,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:20:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:20:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:20:52,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:20:52,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910991024] [2023-04-02 19:20:52,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910991024] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:20:52,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920065904] [2023-04-02 19:20:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:20:52,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:20:52,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:20:52,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 19:20:52,342 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 19:20:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:20:52,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:20:52,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:20:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:20:52,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:20:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:20:52,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920065904] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:20:52,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1388171830] [2023-04-02 19:20:52,646 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-04-02 19:20:52,646 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:20:52,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:20:52,662 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:20:52,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:20:52,836 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-02 19:20:52,991 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 39 [2023-04-02 19:20:55,928 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 85377 conjuctions. This might take some time... [2023-04-02 19:21:01,491 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 625 conjuctions. [2023-04-02 19:21:09,716 WARN L223 SmtUtils]: Spent 5.03s on a formula simplification that was a NOOP. DAG size: 650 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 19:21:35,815 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 22