/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/hard-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:25:28,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:25:28,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:25:28,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:25:28,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:25:28,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:25:28,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:25:28,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:25:28,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:25:28,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:25:28,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:25:28,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:25:28,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:25:28,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:25:28,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:25:28,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:25:28,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:25:28,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:25:28,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:25:28,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:25:28,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:25:28,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:25:28,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:25:28,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:25:28,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:25:28,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:25:28,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:25:28,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:25:28,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:25:28,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:25:28,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:25:28,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:25:28,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:25:28,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:25:28,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:25:28,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:25:28,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:25:28,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:25:28,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:25:28,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:25:28,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:25:28,309 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 11:25:28,334 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:25:28,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:25:28,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:25:28,335 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:25:28,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:25:28,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:25:28,336 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:25:28,336 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:25:28,336 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:25:28,336 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:25:28,336 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:25:28,336 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:25:28,337 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:25:28,337 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:25:28,337 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:25:28,337 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:25:28,337 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:25:28,338 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:25:28,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:25:28,338 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:25:28,338 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:25:28,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:25:28,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:25:28,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:25:28,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:25:28,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:25:28,340 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:25:28,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:25:28,341 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:25:28,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:25:28,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:25:28,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:25:28,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:25:28,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:25:28,342 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:25:28,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:25:28,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:25:28,343 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:25:28,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:25:28,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:25:28,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:25:28,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:25:28,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:25:28,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:25:28,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:25:28,568 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:25:28,568 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:25:28,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2023-04-01 11:25:29,706 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:25:29,890 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:25:29,891 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound10.c [2023-04-01 11:25:29,896 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d2ea8150/b37113a950504c8fb9df37d7a5abf2db/FLAG758a7747b [2023-04-01 11:25:29,908 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d2ea8150/b37113a950504c8fb9df37d7a5abf2db [2023-04-01 11:25:29,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:25:29,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:25:29,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:25:29,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:25:29,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:25:29,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:25:29" (1/1) ... [2023-04-01 11:25:29,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c035f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:29, skipping insertion in model container [2023-04-01 11:25:29,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:25:29" (1/1) ... [2023-04-01 11:25:29,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:25:29,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:25:30,070 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/hard-ll_unwindbound10.c[538,551] [2023-04-01 11:25:30,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:25:30,095 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:25:30,103 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/hard-ll_unwindbound10.c[538,551] [2023-04-01 11:25:30,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:25:30,121 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:25:30,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30 WrapperNode [2023-04-01 11:25:30,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:25:30,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:25:30,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:25:30,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:25:30,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (1/1) ... [2023-04-01 11:25:30,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (1/1) ... [2023-04-01 11:25:30,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (1/1) ... [2023-04-01 11:25:30,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (1/1) ... [2023-04-01 11:25:30,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (1/1) ... [2023-04-01 11:25:30,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (1/1) ... [2023-04-01 11:25:30,146 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (1/1) ... [2023-04-01 11:25:30,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (1/1) ... [2023-04-01 11:25:30,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:25:30,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:25:30,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:25:30,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:25:30,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (1/1) ... [2023-04-01 11:25:30,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:25:30,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:30,188 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 11:25:30,190 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 11:25:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:25:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:25:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:25:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:25:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:25:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:25:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:25:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:25:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:25:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:25:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:25:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:25:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:25:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:25:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:25:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:25:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:25:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:25:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:25:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:25:30,307 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:25:30,309 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:25:30,512 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:25:30,543 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:25:30,544 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:25:30,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:25:30 BoogieIcfgContainer [2023-04-01 11:25:30,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:25:30,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:25:30,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:25:30,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:25:30,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:25:29" (1/3) ... [2023-04-01 11:25:30,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cdd812f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:25:30, skipping insertion in model container [2023-04-01 11:25:30,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:30" (2/3) ... [2023-04-01 11:25:30,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cdd812f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:25:30, skipping insertion in model container [2023-04-01 11:25:30,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:25:30" (3/3) ... [2023-04-01 11:25:30,571 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.c [2023-04-01 11:25:30,616 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:25:30,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:25:30,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:25:30,682 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;@2f4a0b3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:25:30,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:25:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:25:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:25:30,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:30,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:30,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:30,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:30,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1281912795, now seen corresponding path program 1 times [2023-04-01 11:25:30,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:30,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444240724] [2023-04-01 11:25:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:30,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:30,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:30,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444240724] [2023-04-01 11:25:30,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 11:25:30,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414444989] [2023-04-01 11:25:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:30,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:30,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:30,831 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 11:25:30,832 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 11:25:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:30,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:25:30,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:25:30,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:25:30,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414444989] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:30,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:30,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:25:30,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288493963] [2023-04-01 11:25:30,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:30,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:25:30,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:30,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:25:30,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:25:30,944 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:25:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:30,973 INFO L93 Difference]: Finished difference Result 55 states and 86 transitions. [2023-04-01 11:25:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:25:30,982 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 11:25:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:30,987 INFO L225 Difference]: With dead ends: 55 [2023-04-01 11:25:30,988 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 11:25:30,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 11:25:30,993 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:30,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:31,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 11:25:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 11:25:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 11:25:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-04-01 11:25:31,048 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 15 [2023-04-01 11:25:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:31,049 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-04-01 11:25:31,049 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:25:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-04-01 11:25:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:25:31,050 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:31,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:31,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:25:31,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 11:25:31,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:31,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:31,253 INFO L85 PathProgramCache]: Analyzing trace with hash 819854385, now seen corresponding path program 1 times [2023-04-01 11:25:31,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:31,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414162189] [2023-04-01 11:25:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:31,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:25:31,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:31,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414162189] [2023-04-01 11:25:31,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414162189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:31,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:31,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:25:31,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585906615] [2023-04-01 11:25:31,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:31,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:25:31,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:31,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:25:31,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:31,491 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:25:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:31,553 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-01 11:25:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:25:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 11:25:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:31,555 INFO L225 Difference]: With dead ends: 41 [2023-04-01 11:25:31,555 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 11:25:31,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:25:31,556 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:31,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 11:25:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-04-01 11:25:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 11:25:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-04-01 11:25:31,568 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 15 [2023-04-01 11:25:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:31,568 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-04-01 11:25:31,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:25:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-04-01 11:25:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 11:25:31,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:31,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:31,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:25:31,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:31,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1158906488, now seen corresponding path program 1 times [2023-04-01 11:25:31,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:31,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800304357] [2023-04-01 11:25:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:31,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:31,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:31,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477186511] [2023-04-01 11:25:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:31,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:31,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:31,588 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 11:25:31,597 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 11:25:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:31,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:25:31,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:25:31,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:25:31,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:31,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800304357] [2023-04-01 11:25:31,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:31,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477186511] [2023-04-01 11:25:31,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477186511] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:31,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:31,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:25:31,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054272605] [2023-04-01 11:25:31,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:31,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:25:31,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:31,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:25:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:25:31,699 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:25:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:31,722 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-04-01 11:25:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:25:31,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 11:25:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:31,723 INFO L225 Difference]: With dead ends: 47 [2023-04-01 11:25:31,723 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 11:25:31,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:25:31,725 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:31,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 11:25:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 11:25:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 11:25:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-04-01 11:25:31,733 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 17 [2023-04-01 11:25:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:31,733 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-04-01 11:25:31,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:25:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-04-01 11:25:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:25:31,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:31,734 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:31,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:31,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 11:25:31,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:31,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:31,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1070508052, now seen corresponding path program 1 times [2023-04-01 11:25:31,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:31,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111917311] [2023-04-01 11:25:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:31,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:25:32,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:32,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111917311] [2023-04-01 11:25:32,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111917311] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:32,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:32,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:25:32,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028019322] [2023-04-01 11:25:32,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:32,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:25:32,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:32,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:25:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:32,111 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:25:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:32,218 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2023-04-01 11:25:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:25:32,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-04-01 11:25:32,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:32,222 INFO L225 Difference]: With dead ends: 47 [2023-04-01 11:25:32,222 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 11:25:32,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:25:32,224 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:32,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:25:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 11:25:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2023-04-01 11:25:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 11:25:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-04-01 11:25:32,235 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2023-04-01 11:25:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:32,235 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-04-01 11:25:32,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 11:25:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-04-01 11:25:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 11:25:32,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:32,236 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:32,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:25:32,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:32,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:32,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1460275665, now seen corresponding path program 1 times [2023-04-01 11:25:32,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:32,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731500484] [2023-04-01 11:25:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:32,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:32,266 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:32,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931860297] [2023-04-01 11:25:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:32,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:32,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:32,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:32,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:25:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:32,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 11:25:32,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:25:32,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:25:32,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:32,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731500484] [2023-04-01 11:25:32,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:32,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931860297] [2023-04-01 11:25:32,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931860297] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:32,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245658891] [2023-04-01 11:25:32,686 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 11:25:32,686 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:32,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:32,693 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:32,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:32,845 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:33,412 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 11:25:33,446 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:33,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:33,471 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:34,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1245658891] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:34,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:34,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 7] total 23 [2023-04-01 11:25:34,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596045780] [2023-04-01 11:25:34,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:34,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:25:34,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:34,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:25:34,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-04-01 11:25:34,408 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 11:25:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:35,064 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-04-01 11:25:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:25:35,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-04-01 11:25:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:35,066 INFO L225 Difference]: With dead ends: 57 [2023-04-01 11:25:35,066 INFO L226 Difference]: Without dead ends: 55 [2023-04-01 11:25:35,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:25:35,067 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:35,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 37 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:25:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-01 11:25:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-04-01 11:25:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:25:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-04-01 11:25:35,092 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 25 [2023-04-01 11:25:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:35,092 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-04-01 11:25:35,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 11:25:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-04-01 11:25:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 11:25:35,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:35,094 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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 11:25:35,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 11:25:35,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:35,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:35,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:35,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1142294395, now seen corresponding path program 1 times [2023-04-01 11:25:35,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:35,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680073628] [2023-04-01 11:25:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:35,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:35,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:35,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41213586] [2023-04-01 11:25:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:35,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:35,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:35,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:35,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:25:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:35,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:25:35,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:25:35,415 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:25:35,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:35,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680073628] [2023-04-01 11:25:35,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:35,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41213586] [2023-04-01 11:25:35,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41213586] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:35,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:35,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:25:35,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952997295] [2023-04-01 11:25:35,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:35,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:25:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:25:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:35,420 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:25:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:35,468 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2023-04-01 11:25:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:25:35,469 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2023-04-01 11:25:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:35,469 INFO L225 Difference]: With dead ends: 65 [2023-04-01 11:25:35,470 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 11:25:35,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:35,475 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:35,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 92 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 11:25:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-04-01 11:25:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:25:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-04-01 11:25:35,498 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 33 [2023-04-01 11:25:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:35,498 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-04-01 11:25:35,498 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), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:25:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-04-01 11:25:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 11:25:35,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:35,499 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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 11:25:35,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:35,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:35,705 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:35,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1140566517, now seen corresponding path program 1 times [2023-04-01 11:25:35,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:35,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451822884] [2023-04-01 11:25:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:35,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:35,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:35,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116094736] [2023-04-01 11:25:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:35,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:35,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:35,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:35,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:25:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:35,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 11:25:35,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:25:35,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:25:36,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:36,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451822884] [2023-04-01 11:25:36,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:36,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116094736] [2023-04-01 11:25:36,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116094736] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:36,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771894444] [2023-04-01 11:25:36,112 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:25:36,113 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:36,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:36,113 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:36,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:36,177 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:36,720 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 59 for LOIs [2023-04-01 11:25:36,743 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:36,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:36,757 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:37,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [771894444] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:37,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:37,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8, 8] total 27 [2023-04-01 11:25:37,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313404208] [2023-04-01 11:25:37,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:37,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:25:37,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:37,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:25:37,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2023-04-01 11:25:37,983 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:25:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:38,705 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-04-01 11:25:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:25:38,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2023-04-01 11:25:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:38,706 INFO L225 Difference]: With dead ends: 78 [2023-04-01 11:25:38,706 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 11:25:38,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:25:38,708 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:38,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:25:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 11:25:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 11:25:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 11:25:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-04-01 11:25:38,731 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 33 [2023-04-01 11:25:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:38,732 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-04-01 11:25:38,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 11:25:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-04-01 11:25:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 11:25:38,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:38,738 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 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 11:25:38,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:38,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:38,945 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:38,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -191139670, now seen corresponding path program 1 times [2023-04-01 11:25:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:38,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45084742] [2023-04-01 11:25:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:38,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:38,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:38,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500446948] [2023-04-01 11:25:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:38,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:38,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:38,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:25:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:39,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:25:39,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:25:39,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:25:39,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:39,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45084742] [2023-04-01 11:25:39,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:39,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500446948] [2023-04-01 11:25:39,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500446948] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:39,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1112969426] [2023-04-01 11:25:39,096 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:25:39,096 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:39,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:39,097 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:39,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:39,133 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:40,232 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2023-04-01 11:25:40,255 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:40,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:40,266 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:42,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1897#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:25:42,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:42,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:42,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 11:25:42,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840133533] [2023-04-01 11:25:42,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:42,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:25:42,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:42,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:25:42,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:25:42,605 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 11:25:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:42,748 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2023-04-01 11:25:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:25:42,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 35 [2023-04-01 11:25:42,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:42,752 INFO L225 Difference]: With dead ends: 117 [2023-04-01 11:25:42,752 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 11:25:42,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:25:42,754 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:42,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 115 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:25:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 11:25:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2023-04-01 11:25:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.180327868852459) internal successors, (72), 63 states have internal predecessors, (72), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 11:25:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2023-04-01 11:25:42,781 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 35 [2023-04-01 11:25:42,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:42,781 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2023-04-01 11:25:42,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-04-01 11:25:42,783 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2023-04-01 11:25:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 11:25:42,786 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:42,786 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:42,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:42,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:42,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:42,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1456686349, now seen corresponding path program 1 times [2023-04-01 11:25:42,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:42,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303642114] [2023-04-01 11:25:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:43,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:43,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336516154] [2023-04-01 11:25:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:43,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:43,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:43,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:25:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:43,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 11:25:43,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 11:25:43,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 11:25:43,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:43,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303642114] [2023-04-01 11:25:43,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:43,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336516154] [2023-04-01 11:25:43,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336516154] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:43,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137545732] [2023-04-01 11:25:43,336 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:25:43,336 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:43,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:43,336 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:43,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:43,368 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:44,192 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2023-04-01 11:25:44,215 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:44,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:44,224 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:48,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2503#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:25:48,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:48,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:48,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-04-01 11:25:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686020798] [2023-04-01 11:25:48,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 11:25:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 11:25:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:25:48,363 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 11:25:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:48,746 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2023-04-01 11:25:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:25:48,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 43 [2023-04-01 11:25:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:48,748 INFO L225 Difference]: With dead ends: 139 [2023-04-01 11:25:48,749 INFO L226 Difference]: Without dead ends: 119 [2023-04-01 11:25:48,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:25:48,750 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 58 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:48,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 193 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:25:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-04-01 11:25:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-04-01 11:25:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 76 states have internal predecessors, (83), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-04-01 11:25:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 135 transitions. [2023-04-01 11:25:48,773 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 135 transitions. Word has length 43 [2023-04-01 11:25:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:48,773 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 135 transitions. [2023-04-01 11:25:48,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-04-01 11:25:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 135 transitions. [2023-04-01 11:25:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 11:25:48,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:48,774 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:48,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:48,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:48,980 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:48,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash -840800345, now seen corresponding path program 1 times [2023-04-01 11:25:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:48,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2632467] [2023-04-01 11:25:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:48,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:48,987 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:48,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14230404] [2023-04-01 11:25:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:48,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:48,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:48,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:49,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:25:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:49,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 11:25:49,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 11:25:49,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:25:49,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:49,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2632467] [2023-04-01 11:25:49,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:49,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14230404] [2023-04-01 11:25:49,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14230404] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:49,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [302361323] [2023-04-01 11:25:49,199 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:25:49,199 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:49,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:49,200 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:49,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:49,229 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:50,020 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2023-04-01 11:25:50,041 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:50,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:50,051 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:52,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3212#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:25:52,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:52,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:52,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-01 11:25:52,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962306930] [2023-04-01 11:25:52,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:52,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:25:52,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:52,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:25:52,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-04-01 11:25:52,136 INFO L87 Difference]: Start difference. First operand 117 states and 135 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-04-01 11:25:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:52,350 INFO L93 Difference]: Finished difference Result 199 states and 230 transitions. [2023-04-01 11:25:52,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:25:52,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 51 [2023-04-01 11:25:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:52,352 INFO L225 Difference]: With dead ends: 199 [2023-04-01 11:25:52,353 INFO L226 Difference]: Without dead ends: 184 [2023-04-01 11:25:52,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2023-04-01 11:25:52,354 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:52,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 132 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:25:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-01 11:25:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 177. [2023-04-01 11:25:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 118 states have internal predecessors, (128), 40 states have call successors, (40), 25 states have call predecessors, (40), 24 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2023-04-01 11:25:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2023-04-01 11:25:52,375 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 51 [2023-04-01 11:25:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:52,375 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2023-04-01 11:25:52,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-04-01 11:25:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2023-04-01 11:25:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 11:25:52,376 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:52,376 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:52,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 11:25:52,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 11:25:52,582 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:52,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:52,583 INFO L85 PathProgramCache]: Analyzing trace with hash -839072467, now seen corresponding path program 1 times [2023-04-01 11:25:52,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:52,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024642297] [2023-04-01 11:25:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:52,597 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:52,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524135187] [2023-04-01 11:25:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:52,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:52,599 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:25:52,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 11:25:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:52,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 11:25:52,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:25:52,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:25:53,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:53,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024642297] [2023-04-01 11:25:53,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:53,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524135187] [2023-04-01 11:25:53,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524135187] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:53,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737028824] [2023-04-01 11:25:53,406 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:25:53,406 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:53,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:53,407 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:53,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:53,431 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:25:54,217 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 60 for LOIs [2023-04-01 11:25:54,246 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:25:54,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:25:54,254 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:26:01,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4096#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 10 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:26:01,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:26:01,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:26:01,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-04-01 11:26:01,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365066195] [2023-04-01 11:26:01,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:26:01,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 11:26:01,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 11:26:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=803, Unknown=1, NotChecked=0, Total=930 [2023-04-01 11:26:01,995 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 11:26:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:02,797 INFO L93 Difference]: Finished difference Result 198 states and 226 transitions. [2023-04-01 11:26:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:26:02,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 51 [2023-04-01 11:26:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:02,799 INFO L225 Difference]: With dead ends: 198 [2023-04-01 11:26:02,799 INFO L226 Difference]: Without dead ends: 196 [2023-04-01 11:26:02,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=154, Invalid=967, Unknown=1, NotChecked=0, Total=1122 [2023-04-01 11:26:02,800 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 31 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:02,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 11:26:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-04-01 11:26:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 189. [2023-04-01 11:26:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 121 states have (on average 1.1239669421487604) internal successors, (136), 127 states have internal predecessors, (136), 40 states have call successors, (40), 28 states have call predecessors, (40), 27 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2023-04-01 11:26:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 211 transitions. [2023-04-01 11:26:02,825 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 211 transitions. Word has length 51 [2023-04-01 11:26:02,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:02,825 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 211 transitions. [2023-04-01 11:26:02,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-01 11:26:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 211 transitions. [2023-04-01 11:26:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 11:26:02,827 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:02,828 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2023-04-01 11:26:02,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 11:26:03,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:03,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:03,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:03,033 INFO L85 PathProgramCache]: Analyzing trace with hash -309101988, now seen corresponding path program 1 times [2023-04-01 11:26:03,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:03,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477849277] [2023-04-01 11:26:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:03,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:03,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:03,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778693667] [2023-04-01 11:26:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:03,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:03,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:03,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:26:03,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 11:26:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:26:03,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 11:26:03,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 11:26:03,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 11:26:07,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:07,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477849277] [2023-04-01 11:26:07,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:07,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778693667] [2023-04-01 11:26:07,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778693667] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:26:07,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548422983] [2023-04-01 11:26:07,880 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 11:26:07,880 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:07,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:07,880 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:07,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:07,907 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:26:09,208 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:26:09,211 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:26:09,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:26:09,221 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:26:11,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5074#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:26:11,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:26:11,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:26:11,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-01 11:26:11,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66142711] [2023-04-01 11:26:11,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:26:11,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:26:11,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:11,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:26:11,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 11:26:11,841 INFO L87 Difference]: Start difference. First operand 189 states and 211 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 11:26:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:15,870 INFO L93 Difference]: Finished difference Result 228 states and 258 transitions. [2023-04-01 11:26:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:26:15,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 64 [2023-04-01 11:26:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:15,872 INFO L225 Difference]: With dead ends: 228 [2023-04-01 11:26:15,872 INFO L226 Difference]: Without dead ends: 224 [2023-04-01 11:26:15,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 11:26:15,874 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 73 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:15,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 241 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 11:26:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-04-01 11:26:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 207. [2023-04-01 11:26:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 140 states have internal predecessors, (150), 41 states have call successors, (41), 32 states have call predecessors, (41), 30 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2023-04-01 11:26:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 227 transitions. [2023-04-01 11:26:15,913 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 227 transitions. Word has length 64 [2023-04-01 11:26:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:15,914 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 227 transitions. [2023-04-01 11:26:15,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 11:26:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 227 transitions. [2023-04-01 11:26:15,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 11:26:15,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:15,914 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:15,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 11:26:16,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 11:26:16,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:16,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash 870486121, now seen corresponding path program 1 times [2023-04-01 11:26:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010049834] [2023-04-01 11:26:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:16,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:16,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:16,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045128242] [2023-04-01 11:26:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:16,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:16,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:26:16,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 11:26:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:26:16,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 11:26:16,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-01 11:26:16,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:21,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:21,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010049834] [2023-04-01 11:26:21,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:21,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045128242] [2023-04-01 11:26:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045128242] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:26:21,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744117757] [2023-04-01 11:26:21,128 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 11:26:21,128 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:21,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:21,128 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:21,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:21,157 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:26:22,452 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:26:22,454 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 11:26:22,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:26:22,464 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:26:27,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6025#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:26:27,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:26:27,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:26:27,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 11:26:27,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883350364] [2023-04-01 11:26:27,418 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 11:26:27,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:26:27,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:26:27,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 11:26:27,420 INFO L87 Difference]: Start difference. First operand 207 states and 227 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-01 11:26:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:27,902 INFO L93 Difference]: Finished difference Result 241 states and 272 transitions. [2023-04-01 11:26:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:26:27,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2023-04-01 11:26:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:27,903 INFO L225 Difference]: With dead ends: 241 [2023-04-01 11:26:27,904 INFO L226 Difference]: Without dead ends: 204 [2023-04-01 11:26:27,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 11:26:27,905 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 40 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:27,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 232 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:26:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-04-01 11:26:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2023-04-01 11:26:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 134 states have internal predecessors, (142), 40 states have call successors, (40), 29 states have call predecessors, (40), 28 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2023-04-01 11:26:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 219 transitions. [2023-04-01 11:26:27,942 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 219 transitions. Word has length 75 [2023-04-01 11:26:27,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:27,942 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 219 transitions. [2023-04-01 11:26:27,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-04-01 11:26:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 219 transitions. [2023-04-01 11:26:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 11:26:27,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:27,943 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:27,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 11:26:28,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 11:26:28,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:28,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1334221355, now seen corresponding path program 2 times [2023-04-01 11:26:28,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:28,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739179137] [2023-04-01 11:26:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:28,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:28,158 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:28,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91577376] [2023-04-01 11:26:28,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:26:28,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:28,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:28,160 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:26:28,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 11:26:28,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:26:28,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:26:28,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 11:26:28,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 41 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-04-01 11:26:28,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-04-01 11:26:29,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:29,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739179137] [2023-04-01 11:26:29,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:29,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91577376] [2023-04-01 11:26:29,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91577376] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:26:29,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20894465] [2023-04-01 11:26:29,272 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 11:26:29,272 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:29,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:29,273 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:29,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:29,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs