/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/nla-digbench-scaling/dijkstra-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:16:46,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:16:46,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:16:46,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:16:46,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:16:46,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:16:46,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:16:46,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:16:46,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:16:46,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:16:46,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:16:46,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:16:46,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:16:46,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:16:46,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:16:46,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:16:46,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:16:46,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:16:46,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:16:46,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:16:46,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:16:46,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:16:46,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:16:46,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:16:46,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:16:46,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:16:46,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:16:46,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:16:46,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:16:46,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:16:46,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:16:46,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:16:46,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:16:46,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:16:46,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:16:46,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:16:46,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:16:46,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:16:46,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:16:46,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:16:46,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:16:46,347 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 11:16:46,375 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:16:46,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:16:46,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:16:46,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:16:46,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:16:46,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:16:46,377 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:16:46,377 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:16:46,377 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:16:46,377 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:16:46,378 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:16:46,378 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:16:46,378 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:16:46,378 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:16:46,379 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:16:46,379 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:16:46,379 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:16:46,379 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:16:46,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:16:46,380 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:16:46,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:16:46,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:16:46,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:16:46,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:16:46,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:16:46,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:16:46,381 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:16:46,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:16:46,381 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:16:46,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:16:46,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:16:46,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:16:46,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:16:46,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:16:46,382 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:16:46,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:16:46,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:16:46,383 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:16:46,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:16:46,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:16:46,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:16:46,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:16:46,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:16:46,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:16:46,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:16:46,641 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:16:46,642 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:16:46,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2023-04-01 11:16:47,744 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:16:47,932 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:16:47,932 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound20.c [2023-04-01 11:16:47,937 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c87a3a7f1/a049209dfe6f41fbbee43b56a121352f/FLAGdae9295a3 [2023-04-01 11:16:47,952 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c87a3a7f1/a049209dfe6f41fbbee43b56a121352f [2023-04-01 11:16:47,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:16:47,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:16:47,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:16:47,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:16:47,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:16:47,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:16:47" (1/1) ... [2023-04-01 11:16:47,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7068988a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:47, skipping insertion in model container [2023-04-01 11:16:47,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:16:47" (1/1) ... [2023-04-01 11:16:47,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:16:47,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:16:48,137 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/nla-digbench-scaling/dijkstra-u_valuebound20.c[525,538] [2023-04-01 11:16:48,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:16:48,195 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:16:48,205 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/nla-digbench-scaling/dijkstra-u_valuebound20.c[525,538] [2023-04-01 11:16:48,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:16:48,231 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:16:48,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48 WrapperNode [2023-04-01 11:16:48,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:16:48,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:16:48,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:16:48,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:16:48,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (1/1) ... [2023-04-01 11:16:48,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (1/1) ... [2023-04-01 11:16:48,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (1/1) ... [2023-04-01 11:16:48,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (1/1) ... [2023-04-01 11:16:48,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (1/1) ... [2023-04-01 11:16:48,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (1/1) ... [2023-04-01 11:16:48,255 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (1/1) ... [2023-04-01 11:16:48,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (1/1) ... [2023-04-01 11:16:48,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:16:48,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:16:48,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:16:48,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:16:48,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (1/1) ... [2023-04-01 11:16:48,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:16:48,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:48,286 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 11:16:48,296 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 11:16:48,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:16:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:16:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:16:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:16:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:16:48,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:16:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:16:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:16:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:16:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:16:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:16:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:16:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:16:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:16:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:16:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:16:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:16:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:16:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:16:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:16:48,372 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:16:48,374 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:16:48,558 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:16:48,602 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:16:48,602 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:16:48,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:16:48 BoogieIcfgContainer [2023-04-01 11:16:48,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:16:48,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:16:48,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:16:48,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:16:48,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:16:47" (1/3) ... [2023-04-01 11:16:48,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e3076b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:16:48, skipping insertion in model container [2023-04-01 11:16:48,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:48" (2/3) ... [2023-04-01 11:16:48,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e3076b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:16:48, skipping insertion in model container [2023-04-01 11:16:48,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:16:48" (3/3) ... [2023-04-01 11:16:48,612 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.c [2023-04-01 11:16:48,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:16:48,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:16:48,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:16:48,679 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;@6f676546, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:16:48,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:16:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 11:16:48,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 11:16:48,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:48,690 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:48,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:48,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 353083090, now seen corresponding path program 1 times [2023-04-01 11:16:48,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:48,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267658340] [2023-04-01 11:16:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:48,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:16:48,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:48,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267658340] [2023-04-01 11:16:48,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267658340] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:48,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:48,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:16:48,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765815466] [2023-04-01 11:16:48,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:48,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:16:48,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:16:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:16:48,941 INFO L87 Difference]: Start difference. First operand has 33 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:16:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:48,988 INFO L93 Difference]: Finished difference Result 54 states and 86 transitions. [2023-04-01 11:16:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:16:48,998 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 18 [2023-04-01 11:16:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:49,004 INFO L225 Difference]: With dead ends: 54 [2023-04-01 11:16:49,004 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 11:16:49,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:16:49,009 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:49,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:16:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 11:16:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 11:16:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:16:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-04-01 11:16:49,041 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 18 [2023-04-01 11:16:49,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:49,042 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-04-01 11:16:49,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:16:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-04-01 11:16:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 11:16:49,044 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:49,044 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:49,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:16:49,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:49,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:49,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1150511663, now seen corresponding path program 1 times [2023-04-01 11:16:49,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:49,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829806867] [2023-04-01 11:16:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:49,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:16:49,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:49,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829806867] [2023-04-01 11:16:49,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829806867] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:49,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:49,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:16:49,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761471237] [2023-04-01 11:16:49,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:49,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:16:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:16:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:16:49,509 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:16:51,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:53,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:53,994 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2023-04-01 11:16:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:16:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-01 11:16:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:53,997 INFO L225 Difference]: With dead ends: 63 [2023-04-01 11:16:53,997 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 11:16:53,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:16:53,999 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:53,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 94 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 97 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 11:16:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 11:16:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-01 11:16:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 11:16:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-04-01 11:16:54,030 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 19 [2023-04-01 11:16:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:54,031 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-04-01 11:16:54,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:16:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2023-04-01 11:16:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:16:54,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:54,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:54,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:16:54,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:54,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:54,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2006784630, now seen corresponding path program 1 times [2023-04-01 11:16:54,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:54,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752830761] [2023-04-01 11:16:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:54,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:16:54,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:54,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752830761] [2023-04-01 11:16:54,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752830761] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:16:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910597691] [2023-04-01 11:16:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:54,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:54,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:54,422 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 11:16:54,424 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 11:16:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:54,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 11:16:54,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:16:54,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:16:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910597691] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:54,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [172132227] [2023-04-01 11:16:54,810 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:16:54,810 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:54,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:54,817 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:54,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:54,950 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:16:55,516 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 11:16:55,543 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:16:55,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:16:55,559 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:16:56,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [172132227] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:56,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:16:56,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 7, 7] total 25 [2023-04-01 11:16:56,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766837162] [2023-04-01 11:16:56,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:56,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:16:56,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:56,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:16:56,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:16:56,815 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 13 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:17:03,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-01 11:17:05,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-01 11:17:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:17:07,091 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2023-04-01 11:17:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:17:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-04-01 11:17:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:17:07,093 INFO L225 Difference]: With dead ends: 61 [2023-04-01 11:17:07,093 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 11:17:07,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:17:07,094 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 143 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:17:07,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 4 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2023-04-01 11:17:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 11:17:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-01 11:17:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 11:17:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2023-04-01 11:17:07,123 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 21 [2023-04-01 11:17:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:17:07,124 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2023-04-01 11:17:07,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:17:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2023-04-01 11:17:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 11:17:07,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:17:07,126 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2023-04-01 11:17:07,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:17:07,332 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 11:17:07,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:17:07,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:17:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1768861207, now seen corresponding path program 1 times [2023-04-01 11:17:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:17:07,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168815050] [2023-04-01 11:17:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:17:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:17:07,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:17:07,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721334219] [2023-04-01 11:17:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:17:07,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:17:07,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:17:07,366 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 11:17:07,368 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 11:17:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:17:07,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 11:17:07,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:17:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-04-01 11:17:07,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:17:36,204 WARN L223 SmtUtils]: Spent 16.26s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)