/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 IntervalDomain -i ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:07:17,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:07:17,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:07:17,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:07:17,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:07:17,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:07:17,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:07:17,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:07:17,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:07:17,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:07:17,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:07:17,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:07:17,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:07:17,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:07:17,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:07:17,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:07:17,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:07:17,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:07:17,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:07:17,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:07:17,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:07:17,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:07:17,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:07:17,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:07:17,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:07:17,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:07:17,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:07:17,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:07:17,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:07:17,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:07:17,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:07:17,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:07:17,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:07:17,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:07:17,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:07:17,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:07:17,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:07:17,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:07:17,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:07:17,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:07:17,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:07:17,555 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 [2023-03-31 23:07:17,583 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:07:17,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:07:17,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:07:17,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:07:17,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:07:17,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:07:17,584 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:07:17,585 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:07:17,585 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:07:17,585 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:07:17,585 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:07:17,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:07:17,586 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:07:17,586 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:07:17,586 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:07:17,586 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:07:17,586 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:07:17,586 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:07:17,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:07:17,587 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:07:17,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:07:17,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:07:17,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:07:17,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:07:17,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:07:17,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:07:17,588 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:07:17,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:07:17,589 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:07:17,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:07:17,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:07:17,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:07:17,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:07:17,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:07:17,590 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:07:17,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:07:17,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:07:17,590 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:07:17,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:07:17,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:07:17,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:07:17,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:07:17,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:07:17,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:07:17,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:07:17,820 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:07:17,821 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:07:17,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2023-03-31 23:07:18,984 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:07:19,149 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:07:19,150 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2023-03-31 23:07:19,155 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfb466d4c/3c3c7609a2c24912b3730596862ed9cd/FLAGf06c61f49 [2023-03-31 23:07:19,170 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfb466d4c/3c3c7609a2c24912b3730596862ed9cd [2023-03-31 23:07:19,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:07:19,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:07:19,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:07:19,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:07:19,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:07:19,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5f5a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19, skipping insertion in model container [2023-03-31 23:07:19,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:07:19,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:07:19,313 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/loop-invariants/linear-inequality-inv-a.c[557,570] [2023-03-31 23:07:19,317 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/loop-invariants/linear-inequality-inv-a.c[613,626] [2023-03-31 23:07:19,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:07:19,325 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:07:19,334 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/loop-invariants/linear-inequality-inv-a.c[557,570] [2023-03-31 23:07:19,335 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/loop-invariants/linear-inequality-inv-a.c[613,626] [2023-03-31 23:07:19,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:07:19,344 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:07:19,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19 WrapperNode [2023-03-31 23:07:19,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:07:19,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:07:19,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:07:19,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:07:19,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,362 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:07:19,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:07:19,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:07:19,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:07:19,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (1/1) ... [2023-03-31 23:07:19,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:07:19,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:07:19,396 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) [2023-03-31 23:07:19,417 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 [2023-03-31 23:07:19,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:07:19,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:07:19,435 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:07:19,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:07:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:07:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:07:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:07:19,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-03-31 23:07:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:07:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:07:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:07:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:07:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:07:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:07:19,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:07:19,481 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:07:19,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:07:19,578 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:07:19,594 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:07:19,594 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:07:19,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:07:19 BoogieIcfgContainer [2023-03-31 23:07:19,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:07:19,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:07:19,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:07:19,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:07:19,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:07:19" (1/3) ... [2023-03-31 23:07:19,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5f141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:07:19, skipping insertion in model container [2023-03-31 23:07:19,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:07:19" (2/3) ... [2023-03-31 23:07:19,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5f141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:07:19, skipping insertion in model container [2023-03-31 23:07:19,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:07:19" (3/3) ... [2023-03-31 23:07:19,603 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2023-03-31 23:07:19,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:07:19,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-03-31 23:07:19,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:07:19,683 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;@3b654dc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:07:19,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-03-31 23:07:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.6) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:07:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-03-31 23:07:19,712 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:07:19,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:07:19,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:07:19,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:07:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1975456255, now seen corresponding path program 1 times [2023-03-31 23:07:19,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:07:19,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884162957] [2023-03-31 23:07:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:07:19,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:07:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:07:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:20,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:07:20,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884162957] [2023-03-31 23:07:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884162957] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:07:20,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:07:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 23:07:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055676172] [2023-03-31 23:07:20,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:07:20,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 23:07:20,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:07:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 23:07:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:07:20,106 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.6) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:07:20,145 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-03-31 23:07:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 23:07:20,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-03-31 23:07:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:07:20,155 INFO L225 Difference]: With dead ends: 28 [2023-03-31 23:07:20,155 INFO L226 Difference]: Without dead ends: 14 [2023-03-31 23:07:20,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 23:07:20,165 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:07:20,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:07:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-03-31 23:07:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-03-31 23:07:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-03-31 23:07:20,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2023-03-31 23:07:20,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:07:20,188 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-03-31 23:07:20,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:20,188 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-03-31 23:07:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-03-31 23:07:20,189 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:07:20,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:07:20,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:07:20,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:07:20,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:07:20,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1110270621, now seen corresponding path program 1 times [2023-03-31 23:07:20,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:07:20,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407019200] [2023-03-31 23:07:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:07:20,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:07:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:07:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:20,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:07:20,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407019200] [2023-03-31 23:07:20,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407019200] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:07:20,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088726285] [2023-03-31 23:07:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:07:20,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:07:20,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:07:20,417 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) [2023-03-31 23:07:20,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:07:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:07:20,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:07:20,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:07:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:20,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:07:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:20,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088726285] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:07:20,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [291732418] [2023-03-31 23:07:20,756 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-03-31 23:07:20,756 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:07:20,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:07:20,762 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:07:20,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:07:20,824 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:07:20,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:07:20,877 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:07:20,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '141#(and (<= (mod main_~n~0 256) (mod main_~i~0 4294967296)) (<= 0 main_~i~0) (< (mod main_~s~0 4294967296) (mod main_~v~0 256)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:07:20,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:07:20,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:07:20,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 23:07:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498464319] [2023-03-31 23:07:21,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:07:21,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:07:21,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:07:21,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:07:21,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:07:21,004 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:07:21,066 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-03-31 23:07:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:07:21,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-03-31 23:07:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:07:21,067 INFO L225 Difference]: With dead ends: 31 [2023-03-31 23:07:21,067 INFO L226 Difference]: Without dead ends: 25 [2023-03-31 23:07:21,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:07:21,069 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:07:21,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 22 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:07:21,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-31 23:07:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2023-03-31 23:07:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-03-31 23:07:21,074 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2023-03-31 23:07:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:07:21,075 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-03-31 23:07:21,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-03-31 23:07:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 23:07:21,076 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:07:21,076 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:07:21,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:07:21,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:07:21,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:07:21,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:07:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1838908962, now seen corresponding path program 1 times [2023-03-31 23:07:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:07:21,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268972024] [2023-03-31 23:07:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:07:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:07:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:07:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:21,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:07:21,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268972024] [2023-03-31 23:07:21,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268972024] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:07:21,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852621802] [2023-03-31 23:07:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:07:21,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:07:21,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:07:21,472 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) [2023-03-31 23:07:21,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:07:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:07:21,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 23:07:21,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:07:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:21,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:07:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:22,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852621802] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:07:22,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128485943] [2023-03-31 23:07:22,086 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-03-31 23:07:22,087 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:07:22,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:07:22,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:07:22,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:07:22,115 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:07:22,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:07:22,139 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:07:22,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '295#(and (<= (mod main_~n~0 256) (mod main_~i~0 4294967296)) (< 65025 (mod main_~s~0 4294967296)) (<= 0 main_~i~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:07:22,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:07:22,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:07:22,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-03-31 23:07:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093372382] [2023-03-31 23:07:22,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:07:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:07:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:07:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:07:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:07:22,279 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:22,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:07:22,326 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-03-31 23:07:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:07:22,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 23:07:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:07:22,327 INFO L225 Difference]: With dead ends: 29 [2023-03-31 23:07:22,327 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 23:07:22,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-03-31 23:07:22,329 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:07:22,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:07:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 23:07:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-03-31 23:07:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-03-31 23:07:22,334 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2023-03-31 23:07:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:07:22,334 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-03-31 23:07:22,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-03-31 23:07:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 23:07:22,335 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:07:22,335 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:07:22,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 23:07:22,541 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 [2023-03-31 23:07:22,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:07:22,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:07:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1193101695, now seen corresponding path program 2 times [2023-03-31 23:07:22,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:07:22,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813413239] [2023-03-31 23:07:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:07:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:07:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:07:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:22,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:07:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813413239] [2023-03-31 23:07:22,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813413239] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:07:22,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739767790] [2023-03-31 23:07:22,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:07:22,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:07:22,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:07:22,708 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) [2023-03-31 23:07:22,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:07:22,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:07:22,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:07:22,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 23:07:22,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:07:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:22,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:07:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:29,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739767790] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:07:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537510850] [2023-03-31 23:07:29,954 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-03-31 23:07:29,954 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:07:29,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:07:29,954 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:07:29,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:07:29,969 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:07:29,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:07:29,985 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:07:30,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '461#(and (<= (mod main_~n~0 256) (mod main_~i~0 4294967296)) (<= 0 main_~i~0) (< (mod main_~s~0 4294967296) (mod main_~v~0 256)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:07:30,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:07:30,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:07:30,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-03-31 23:07:30,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239517778] [2023-03-31 23:07:30,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:07:30,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 23:07:30,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:07:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 23:07:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-03-31 23:07:30,099 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:07:30,502 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-03-31 23:07:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 23:07:30,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 23:07:30,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:07:30,503 INFO L225 Difference]: With dead ends: 43 [2023-03-31 23:07:30,503 INFO L226 Difference]: Without dead ends: 39 [2023-03-31 23:07:30,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:07:30,506 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:07:30,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 31 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:07:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-31 23:07:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2023-03-31 23:07:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-03-31 23:07:30,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2023-03-31 23:07:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:07:30,512 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-03-31 23:07:30,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-03-31 23:07:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 23:07:30,513 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:07:30,513 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:07:30,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:07:30,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:07:30,714 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:07:30,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:07:30,715 INFO L85 PathProgramCache]: Analyzing trace with hash 793239902, now seen corresponding path program 2 times [2023-03-31 23:07:30,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:07:30,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580284388] [2023-03-31 23:07:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:07:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:07:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:07:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:30,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:07:30,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580284388] [2023-03-31 23:07:30,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580284388] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:07:30,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708219090] [2023-03-31 23:07:30,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:07:30,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:07:30,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:07:30,908 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) [2023-03-31 23:07:30,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:07:30,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 23:07:30,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:07:30,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 23:07:30,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:07:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:31,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:07:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:34,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708219090] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:07:34,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251678388] [2023-03-31 23:07:34,600 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-03-31 23:07:34,600 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:07:34,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:07:34,601 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:07:34,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:07:34,614 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:07:34,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:07:34,629 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:07:34,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '689#(and (<= (mod main_~n~0 256) (mod main_~i~0 4294967296)) (< 65025 (mod main_~s~0 4294967296)) (<= 0 main_~i~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:07:34,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:07:34,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 23:07:34,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-03-31 23:07:34,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574987663] [2023-03-31 23:07:34,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 23:07:34,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 23:07:34,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:07:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 23:07:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2023-03-31 23:07:34,752 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:35,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 23:07:37,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 23:07:39,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 23:07:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:07:40,018 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-03-31 23:07:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 23:07:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-31 23:07:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:07:40,020 INFO L225 Difference]: With dead ends: 45 [2023-03-31 23:07:40,020 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 23:07:40,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2023-03-31 23:07:40,021 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:07:40,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 51 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-03-31 23:07:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 23:07:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-03-31 23:07:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-03-31 23:07:40,028 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2023-03-31 23:07:40,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:07:40,029 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-03-31 23:07:40,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:07:40,029 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-03-31 23:07:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 23:07:40,029 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:07:40,029 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:07:40,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:07:40,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:07:40,236 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:07:40,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:07:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1293019969, now seen corresponding path program 3 times [2023-03-31 23:07:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:07:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231345877] [2023-03-31 23:07:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:07:40,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:07:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:07:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:40,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:07:40,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231345877] [2023-03-31 23:07:40,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231345877] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:07:40,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105253092] [2023-03-31 23:07:40,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:07:40,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:07:40,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:07:40,571 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) [2023-03-31 23:07:40,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:07:40,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:07:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:07:40,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-31 23:07:40,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:07:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:07:40,739 INFO L327 TraceCheckSpWp]: Computing backward predicates...